Fixes or workarounds for recent issues in Outlook for Windows

Last updated: October 20, 2017

For issues that are not covered on this page, we have multiple tools to help you automatically diagnose and fix a range of Outlook problems. Check out this article: Resolve Outlook for Windows issues with automated troubleshooting tools

Jump to each section on this page for specific Outlook issue:

Outlook issues after connecting Outlook to Outlook.com

Outlook known issues in the June 2017 security updates

Outlook crashes and slow performance

Other Outlook issues affecting email messages, attachments, and features

Outlook known issues in the Oct 2017 updates

Last Updated: October 12, 2017

ISSUE

After installing the October Public Update, folder home pages no longer appear and the Home Page feature is missing in Outlook folder properties. This feature was disabled by default to limit security vulnerabilities.

This affects Outlook 2010, Outlook 2013, and Outlook 2016.

STATUS: WORKAROUND

WORKAROUND #1 (Recommended) :

If the folder Home Page that you use is associated with one of Outlook's default folders, the recommended workaround is to use WebView registry entries and point the URL target to an internal website instead of an external website. For example, if you wanted your Inbox to point to an internal home page, you can add the following WebView registry key and set the URL string to an internal location:

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Inbox] "URL"="http://[place internal URL here]"

WebView Registry Key_C3_201791217167

Here are a few more examples of WebView registry keys you can add for other default folders:

Folder

Registry Entry

Calendar

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Calendar] "URL"="http://[place internal URL here]"

Contacts

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Contacts] "URL"="http://[place internal URL here]"

Deleted Items

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Deleted Items] "URL"="http://[place internal URL here]"

Drafts

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Drafts] "URL"="http://[place internal URL here]"

Journal

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Journal] "URL"="http://[place internal URL here]"

Junk E-mail

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Junk E-mail] "URL"="http://[place internal URL here]"

Notes

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Notes] "URL"="http://[place internal URL here]"

Outbox

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Outbox] "URL"="http://[place internal URL here]"

RSS

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\RSS] "URL"="http://[place internal URL here]"

Sent Mail

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Sent Mail] "URL"="http://[place internal URL here]"

Tasks

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\WebView\Tasks] "URL"="http://[place internal URL here]"

WORKAROUND #2 :

If your home page is not associated with a default folder, or you want to choose to lower the security protection against malicious web pages, you can set this registry key to re-enable the original folder tab and rendering behavior:

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security] "EnableRoamingFolderHomepages"=dword:00000001

Last updated: Oct 12, 2017

ISSUE

Outlook 2016 On Premise users are prompted for credentials when opening email attachments. This occurs after updating to Current Channel build 16.0.8431.2079.

STATUS: WORKAROUND

Do the following to revert to an earlier build:

  1. Open a command prompt window.

  2. At the command prompt, run the following commands:

    cd %programfiles%\Common Files\Microsoft Shared\ClickToRun\

    officec2rclient.exe /update user updatetoversion=16.0.8326.2107

Note: If 16.0.8326.2107 is unavailable, refer to Version and build numbers of update channel releases to find another recent version for your respective channel.

For more information on how to revert to an earlier Office version, see How to revert to an earlier version of Office 2013 or Office 2016 Click-to-Run.

Last Updated: October 16, 2017

ISSUE

After installing the October Public Update for Outlook 2010 or Outlook 2013, you may get this error in the folder pane display when you click on folders in the Business Contact Manager pane:

We didn't find anything to show here.

Additionally, an error dialog appears with this error:

Business Contact Manager for Outlook could not complete your last action or actions. Please try again.

STATUS: WORKAROUND

Add this registry key to the local client and restart Microsoft Outlook:

For Outlook 2013: [HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Security] "EnableRoamingFolderHomepages"=dword:00000002

For Outlook 2010: [HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security] "EnableRoamingFolderHomepages"=dword:00000002

NOTE: Business Contact Manager is not supported with Outlook 2016.

Outlook known issues in the Sep 2017 security updates

Last updated: Sep 19, 2017

ISSUE

After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface.

Security update for Outlook 2007: September 12, 2017

Customers using the language in the first column may see parts of the page in the language listed in the second column:

Arabic

Swedish

Bulgarian

Brazilian Portuguese

Catalan

Brazilian Portuguese

Czech

Swedish

Hungarian

Swedish

Italian

Brazilian Portuguese

Kazakh

Brazilian Portuguese

Korean

Brazilian Portuguese

Latvian

Swedish

Norwegian

Swedish

Dutch

Swedish

Portuguese

Brazilian Portuguese

Slovenian

Swedish

Serbian Latin

Swedish

Thai

Chinese Traditional Taiwan

Turkish

Chinese Traditional Taiwan

STATUS: Fixed

This issue is fixed now.

Please follow the instructions in KB 4011086 to uninstall it, and then install KB 4011110.

Last updated: Oct 13, 2017

ISSUE

Custom form script is now disabled by default and requires setting registry keys to re-enable it.

  1. The new registry key has a default value of 1, which indicates form script should not run.

    First create this key:

    32 bit Office on 64 bit Windows

    HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Office\16.0\Outlook\Security

    32 bit Office on 32 bit Windows or 64 bit Office on 64 bit Windows

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\16.0\Outlook\Security

    Then create DWORD (32-bit) Value 0 and set the name to DisableCustomFormItemScript to enable custom form scripts.

  2. Once custom form scripts have been enabled at all, they must then be enabled per form message class. For instance, if you have a form with the message class IPM.Note.Custom, we must register “IPM.Note.Custom” as a trusted form message class. To do this, first create this key:

    32 bit Office on 64 bit Windows

    HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Office\16.0\Outlook\Forms\TrustedFormScriptList

    32 bit Office on 32 bit Windows or 64 bit Office on 64 bit Windows

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\16.0\Outlook\Forms\TrustedFormScriptList

Then, create REG_SZ values in this key for each form you wish to allow scripts to run. In the above example, you would create a REG_SZ value named “IPM.Note.Custom” with empty data.

When designing a form, Run This Form will run a form using the message class of the base form. So if you started designing an IPM.Note form and want to Run This Form, you will need to have IPM.Note registered. After you publish, the published message class is what will be checked. Once you have finished designing your form and published it to a custom form name, remove the standard “IPM.Note” from the trusted list.

Notes: 

  • You need to restart Outlook after setting the TrustedFormScriptList key.

  • The example registry keys use 16.0 for Outlook 2016. Use 15.0 for Outlook 2013, 14.0 for Outlook 2010 and 12.0 for Outlook 2007.

After making the above changes the registry keys will look like the following:

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Office\16.0\Outlook\Security]

DisableCustomFormItemScript"=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Office\16.0\Outlook\Forms\TrustedFormScriptList]

"IPM.Note.Custom"=""

"IPM.Note"=""

Registry keys

Registry keys

NOTE: In some cases forms in secondary mailboxes and Public folders still don't work after the registry key settings. To fix this, enable scripts in the Trust Center:

  1. Click File > Options. Then select Trust Center > Trust Center Settings > Email Security.

  2. Under the Script in Folders section, click the checkbox for Allow script in shared folders and Allow script in Public folders and click OK and OK again to close out the windows.

STATUS

The change was first introduced in the September 12th, 2017 Outlook Public Updates and is included in the following MSI updates which now require the registry keys.

Outlook 2007

Outlook 2010

Outlook 2013

Outlook 2016

Click to Run status is as follows:

  1. Monthly Channel (Current Channel) will start supporting the registry keys in the update scheduled for September 18th release build 16.0.8431.2079.

  2. Semi-Annual Channel (FRDC) supports the registry keys with build 16.0.8431.2079.

  3. Deferred Channel supports the registry keys with build 16.0.8201.2193.

  4. Deferred Extended status is TBD.

  5. Insider Fast status is TBD.

  6. Insider Slow supports the registry keys with build 16.0.8431.2079.

Last Updated: October 13, 2017

ISSUE

This occurs because custom form script is now disabled by default.

STATUS: WORKAROUND

Please follow the steps provided in Issue #2: Custom form script is now disabled by default which is just above this issue.

Important Announcement about Outlook.com

ACTION REQUIRED: Reconnect Outlook 2016 or Outlook 2013 to Outlook.com for uninterrupted email access

Earlier this year we introduced the new Outlook.com, which helps you focus on what matters, collaborate effortlessly, and get more done. As part of the upgrade, we are also moving accounts to a more secure and reliable infrastructure. The upgrade impacts all Outlook, Hotmail, Live, or MSN email accounts.

Once your Outlook.com account has been upgraded, you’ll need to reconnect Outlook 2016 or Outlook 2013 to your Outlook.com account to ensure the best experience and fix issues. To check if your account has been upgraded, login to your account through a web browser and compare your mailbox with the images below.

Mailbox Pre-Upgrade

Outlook.com menu bar

Mailbox Post-Upgrade

Outlook Mail menu bar

If you do not reconnect your upgraded email account, you will soon no longer be able to send or receive Outlook.com emails via your desktop version of Outlook 2016 and 2013 until you reconnect. Additionally, by not reconnecting, you may experience email and calendar sync issues that will be resolved once you reconnect. You will still be able to send and receive emails via the web on www.Outlook.com.

For detailed instructions and help on how to reconnect your account, please visit this article.

Note: This change only affects any Outlook.com accounts you are accessing via Outlook 2016 or Outlook 2013. You do not need to reconnect to your other email accounts, such as Office 365, Exchange, or other third party email accounts. You can also continue to send, receive, and access email from your Outlook.com account on the web via any popular web browser.

Outlook issues after connecting Outlook to Outlook.com

Last updated: July 20, 2017

ISSUE

When connecting your Outlook.com account to Outlook 2016 or Outlook 2013, you are prompted to log-in multiple times.

STATUS: WORKAROUND

If you setup two-step verification on your account you will need to create an App Password to add the account in Outlook.

ISSUE

After connecting to Outlook for Windows (Outlook 2016, 2013, 2010 versions) to your Outlook.com email account, your may experience the following:

  • Your email account name shows up as outlook_[long series of letters and numbers]@outlook.com in the Folder Pane and when composing emails using Outlook for Windows.

  • Recipients will also receive the email from the sender with the outlook_[long series of letters and numbers]@outlook.com format.

  • When recipients reply to the email, the email bounces and you may receive the message “Undeliverable message when you send Internet mail in Outlook.”

This issue only impacts customers using Outlook for Windows. Emails sent via Outlook.com on the web works correctly and emails will be sent with the correct email address.

WORKAROUND

This issue occurs for users with multiple account aliases. We are actively working on a fix. In the meantime, to fix this issue, please do the following:

  1. Go to https://account.live.com/names/Manage and sign in to your Outlook.com account.

  2. Set your Outlook.com email as the primary alias.

  3. In Outlook for Windows, remove and re-add the account. See the steps in this article: Add your Outlook.com account in Outlook for Windows

Last updated: February 8, 2017

ISSUE

If Outlook is connected to a primary Outlook.com account that is also connected to other secondary non-Microsoft accounts (such as Gmail, Yahoo, etc.), when sending an email in Outlook, you are not able to choose the other secondary connected account as the "From" sending account.

If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account.

STATUS: WORKAROUND

Outlook supports sending from a secondary connected account for Microsoft owned domains such as @outlook.com, @live.com, @hotmail.com but has not implemented this functionality for third-party domains.

The Outlook team is listening to your feedback and investigating adding this functionality to future updates. Please vote up the request and add any feedback on UserVoice: Option to make Microsoft Outlook 2016 work with Outlook.com connected. In the meantime, please use the following workaround:

WORKAROUND

You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile.

  1. In Outlook, choose the File tab.

    Screenshot of left section of Outlook ribbon with File selected
  2. Under Account Information, choose Add Account.

    Add Account command in the Backstage view
  3. On the Auto Account Setup page, enter your name, email address, and password, and then choose Next.

    Note: If you receive an error message after choosing Next, double check your email address and password. If both are correct, see the next section.

  4. Choose Finish.

For more information, please see Outlook email setup.

Last updated: January 24, 2017

ISSUE

When connecting in Outlook as an Exchange account, you are unable to configure your personal custom domain email account.

WORKAROUND

  1. Add a CNAME record to your DNS settings at your domain registrar. A CNAME record is needed for Outlook to configure the account using Autodiscover. The only record you need to add is for Host Autodiscover.

    Record type

    Host

    Points to

    TTL

    CNAME (Alias)

    autodiscover

    autodiscover.outlook.com

    1 hour

  2. Verify your MX record is still configured for Hotmail. An MX record ensures you can receive email from other people.

    When you originally setup your Domain settings for Outlook.com an MX record was added to your DNS settings. This record has some unique numbers and/or letters followed by *.pamx1.hotmail.com and it needs to be preserved. You can confirm the MX record is still configured properly by looking up your domain at https://mxtoolbox.com. This record should be listed before any other MX records for this domain. For example, this is what it should look like on https://mxtoolbox.com:

    Pref

    Hostname

    IP Address

    TTL

    10

    123456789.pamx1.hotmail.com

    65.54.188.109

    60 min

    Backlist Check

    SMTP Test

Last updated: May 2, 2017

Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com account, even if you've reconnected your Outlook.com account to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows.

To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app.

Last updated: May 2, 2017

ISSUE

When you try to accept a shared Outlook.com calendar using your Office 365 for business account in Outlook 2016, you might receive the "Something went wrong" error or your sign-in might fail.

STATUS: WORKAROUND

To access the calendar shared with your Office 365 for business account, you’ll need to accept the invitation from Outlook on the web . If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation in Outlook on the web. The person who sent you the invitation will need to remove your permissions and then send a new invitation.

Outlook.com "Something went wrong" error code 500

Outlook known issues in the June 2017 security updates

Last updated: July 11, 2017

The issues documented in this section have been reported after installing the recent updates listed below. We're investigating the issues and will update this page when a fix is available. In the meantime, please use the workarounds suggested for each issue.

Security update for Outlook 2007: June 13, 2017

Security update for Outlook 2010: June 13, 2017

Security update for Outlook 2013: June 13, 2017

Security update for Outlook 2016: June 13, 2017

Security update for Windows 8, June 13, 2017

Security update for Windows 10, June 13, 2017

Security update for Windows 10, June 13, 2017

Security update for Windows 7, June 13, 2017

Security update for Windows 7, June 13, 2017

ISSUE

Last updated: Sep 17, 2017

Note: Please also see this article for an update on this issue: Custom form script is now disabled by default.

This issue affects Outlook 2007, Outlook 2010, Outlook 2013, and Outlook 2016.

When you use a custom form that you have created for Outlook, you see the following two symptoms:

  • VBScript does not run.

  • You get a malicious code warning:

    Outlook Error

STATUS

If you’re an Office 365 customer, the fix is now available to Insider Fast audience.

For other channels, an update is scheduled for mid-September, in versions 16.0.8418.5703 and later. We will update this page when the fix is released.

Issue is fixed for all MSI versions. For Outlook 2007, Outlook 2010, Outlook 2013 and Outlook 2016, install the updates below to fix the issue:

Update for Outlook 2007: July 27, 2017

Update for Outlook 2010: July 27, 2017

Update for Outlook 2013: July 27, 2017

Update for Outlook 2016: July 27, 2017

ISSUE

Last updated: August 3, 2017

This issue affects all Outlook versions on Windows 7, Windows 8, Windows 10.

When searching in Outlook, you get this error: “Something went wrong and your search couldn’t be completed.”, or "Search results may be incomplete because items are still being indexed".

Outlook Error

And you'll see this Event Log warning:

Outlook Event Log Warning

STATUS: FIXED

Windows has released fixes via Windows Updates to address a reliability issue in Windows Search. Below are the relevant KB updates for each version:

Note: The fix for this issue has been released on June 27, 2017. If you implemented the workaround to disable Windows Desktop Search Service, you can now set the PreventIndexingOutlook registry key to DWORD: 0 to go back to using Windows Search.

WORKAROUND

If the issue is not resolved after installing the updates, please use the workaround below:

  1. If search is not working for Exchange accounts, delete the OST files which will cause a re-sync and re-index of the account:

    • OST files are typically stored at C:\Users\<your username>\AppData\Local\Microsoft\Outlook.

    • To find the name and location of the OST file, click File, Account Settings, Account Settings, Data Files. Locate the correct email address, click on the name, and click Open File Location.

    • Before you can delete the OST file, you need to close Outlook so the process will release the file.

    • After deleting the file, restart Outlook and let the email sync again.

  2. Another workaround is to Create a new Outlook profile, and add your accounts to the new profile. We recommend keeping the old profile until you know you have moved over any local data or PST files.

Until you can install the Windows Update fix release, you can set a registry key that will cause Outlook to stop using the local Windows Search service. When this registry key is set, Outlook will use its own built-in search engine. The built-in search will display the message below to indicate it is not using the Windows Search service.

Outlook Search Warning

Disable Windows Desktop Search Service for Outlook:

Note: The following steps show you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Please make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see this article.

  • Open Registry Editor.

  • Go to: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Search

  • PreventIndexingOutlook

  • Set DWORD: 1

Detailed Instructions:

  1. Click Start, click Run, type regedit in the Open box, and then click OK.

  2. Locate and then click the following subkey in the registry:
    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows

  3. On the Edit menu, point to New, and then click New Key and name the key Windows Search.

  4. Click on the new key Windows Search.

  5. On the Edit menu, point to New, and then click DWORD Value.

  6. Type PreventIndexingOutlook for the name of the DWORD, and then press Enter.

  7. Right-click PreventIndexingOutlook, and then click Modify.

  8. In the Value data box, type 1 to enable the registry entry, and then click OK.

  9. Note to disable the PreventIndexingOutlook setting, type 0 (zero), and then click OK.

  10. Exit Registry Editor, and then restart Outlook.

ISSUE

iCloud fails to load properly in Outlook 2007, Outlook 2010, Outlook 2013 and Outlook 2016.

When accessing Calendar, Contacts, or Tasks, you get the following error:

The set of folders cannot be opened. MAPI was unable to load the information service C:\PROGRA~2\COMMON~1\Apple\Internet Services\APLZOD.dll. Be sure the service is correctly installed and configured."

Outlook Error

STATUS: WORKAROUND

The loading of unregistered MAPI services has been disabled by default to make Outlook more secure.

If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue. For more information, see this page.

For Outlook 2007, use the workaround below:

Warning: This workaround may make your computer or your network more vulnerable to attack by malicious users or by malicious software such as viruses. Microsoft does not recommend this workaround but is providing this information so that you can choose to implement this workaround at your own discretion. Use this workaround at your own risk.

If you have trusted applications that depend on being loaded in this manner, you can re-enable those applications by setting the following registry key:

REG_DWORD HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security\AllowUnregisteredMapiServices

You can use the following registry subkey to apply the registry setting as a domain policy:

HKCU\Software\Policies\Microsoft\Office\12.0\Outlook\Security\AllowUnregisteredMapiServices

Value 0 (default): Block loading of unregistered MAPI services. This is the recommended setting to avoid unexpected execution of unknown code.

Value 1: Enable loading of unregistered MAPI services.

Important: The following steps show you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Please make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see this article.

To make these registry changes, follow these steps:

  1. Click Start, click Run, type regedit in the Open box, and then click OK.

  2. Locate and then click the following subkey in the registry:

    HKCU\Software\Microsoft\Office\12.0\Outlook\Security\

  3. On the Edit menu, point to New, and then click DWORD Value.

  4. Type AllowUnregisteredMapiServices for the name of the DWORD, and then press Enter.

  5. Right-click AllowUnregisteredMapiServices, and then click Modify.

  6. In the Value data box, type 1 to enable the registry entry, and then click OK.

    Note: To disable the AllowUnregisteredMapiServices setting, type 0 (zero), and then click OK.

  7. Exit Registry Editor, and then restart the computer.

Vulnerability information (applies to all versions)

MAPI does not validate that a provider’s DLL that it is requested to load is registered correctly in MapiSVC.inf or even that it comes from the local machine. This can be exploited by creating a file together with an OLE object in such a way to cause MAPI to load a DLL from a network share when the OLE object is activated. This can allow arbitrary code execution to occur.

Last updated: July 26, 2017

ISSUE

Some Web-based Outlook add-ins don't work in Outlook when using on premise Microsoft Exchange 2013.

This only applies to the MSI installations of Outlook 2016/Office 2016. Click-2-Run installations are not affected. The Office App add-in may show an Operation Failed error or seem to not respond to button presses or other UI choices.

Status: Investigating

We're investigating the issue and will update this page when a fix is available.

Last updated: August 3, 2017

ISSUE

Outlook crashes when you click File, Options , and you see the error below.

Outlook Crash Error

This issue only affects FRDC, (First Release for Deferred Channel) version 16.0.8201.2158.

Crash details:

Faulting application name: OUTLOOK.EXE, version: 16.0.8201.2158, time stamp: 0x5975d6bc

Faulting module name: KERNELBASE.dll, version: 6.1.7601.23807, time stamp: 0x5915fe14

Exception code: 0xc06d007f

Fault offset: 0x000000000001a06d

Faulting process id: 0x11fc

Faulting application start time: 0x01d307f0bc63afda

Faulting application path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE

Faulting module path: C:\windows\system32\KERNELBASE.dll

Status: Workaround

We're investigating this issue. In the meantime, revert to build 16.0.8201.2136 using instructions in this KB article.

Outlook crashes and slow performance

Last updated: August 3, 2017

ISSUE

Outlook crashes when you click File, Options , and you see the error below.

Outlook Crash Error

This issue only affects FRDC, (First Release for Deferred Channel) version 16.0.8201.2158.

Crash details:

Faulting application name: OUTLOOK.EXE, version: 16.0.8201.2158, time stamp: 0x5975d6bc

Faulting module name: KERNELBASE.dll, version: 6.1.7601.23807, time stamp: 0x5915fe14

Exception code: 0xc06d007f

Fault offset: 0x000000000001a06d

Faulting process id: 0x11fc

Faulting application start time: 0x01d307f0bc63afda

Faulting application path: C:\Program Files\Microsoft Office\root\Office16\OUTLOOK.EXE

Faulting module path: C:\windows\system32\KERNELBASE.dll

Status: Workaround

We're investigating this issue. In the meantime, revert to build 16.0.8201.2136 using instructions in this KB article.

Last updated: June 7, 2017

ISSUE

After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start running.

STATUS: FIXED

This issue is now fixed in Version 1705 (Build 8201.2075). To get the update Office, open any Office 2016 app and choose File > Account > Update Options > Update.

Last updated: Oct 20, 2017

ISSUE

Outlook 2016 freezes when you try to preview an Excel file that’s attached to an email.

Fixed

Please install the Windows 10 Fall Creators Update to fix this issue.

Other Outlook issues affecting email messages, attachments, and features

Last Updated: October 17, 2017

ISSUE

When you try to configure a secondary account from the same Office 365 tenant in Outlook 2016 (Current Channel) with ADAL enabled, you receive the following error: "An encrypted connection to your mail server is not available. Click Next to attempt using an unencrypted connection."

STATUS: WORKAROUND

To workaround this issue, you can disable ADAL on the client. To do this, follow these steps to Disable modern authentication on devices.

You can also switch to First Release Deferred Channel or Deferred Channel.

Last updated: July 20, 2017

ISSUE

For IMAP and POP accounts, if you configure the Junk Email Options to Safe Lists Only, and send multiple emails from an unsafe email account afterwards – the initial email will go to Junk Mail, the rest will continue to arrive in your Inbox.

Junk Mail options

Status: Investigating

We will update this article when a fix is available. In the meantime, please manually delete the emails that appear in your inbox.

Last updated: June, 5 2017

ISSUE

You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list.

If your Outlook version is 1703 (Build 7967.2161) or higher, the filters and sort options were moved under the All drop down menu, to accommodate space for the new Focused inbox.

Note: If you don't know your Outlook version, go to File > Office Account to check your Outlook version.

How to filter and sort your mail

To sort your emails by Unread, Mentioned or use other filters, select the All button and choose one of the options. You can also select Arrange By and then pick one of the options such as Date, From, etc.

Outlook All Menu

Another options is to use the Filter Email button on the ribbon. For more information, see Filter email messages.

Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers.

Outlook Field header

Use the Quick Access Toolbar

To access the filtering options faster, add them to your Quick Access Toolbar.

For example, to add Unread to the Quick Access Toolbar:

  1. Click anywhere in the Search box.

  2. When the Search tab commands become available on the toolbar, right-click the Unread icon, and then select Add to Quick Access Toolbar.

    Outlook add to quick access toolbar

To add Arrange by to your Quick Access Toolbar, you need to add it to the ribbon first:

  1. Right click the Ribbon and click Customize the Ribbon.

  2. Under the Customize the Ribbon Main Tabs , click the Home (Mail) > New Group.

  3. Select Rename, and rename the new group to Arrange.

  4. In the Choose commands from column, select All Commands.

  5. Scroll down to Arrange By, select the third Arrange By and click Add.

  6. Click the name of the new group (Arrange By) under Customize the Ribbon, and click the UP arrow to move it under the Respond group. You can change this later if you want to move it somewhere else.

  7. Click OK. This will add the new group on the Ribbon.

  8. To add Arrange by to your Quick Access Toolbar, right click on the new Arrange By button and click Add to Quick Access Toolbar.

For more information, see Add a command to the Quick Access Toolbar

There is currently no option to revert to the prior behavior, but we would love to hear your feedback to help us with future designs . Please visit the Outlook User Voice page, and let us know what you think of these options.

Last updated: August, 18 2017

ISSUE

Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite. This happens to accounts that are configured in the iOS Mail app.

Status: FIXED

This issue is fixed. Please install the latest updates on your phone to resolve the issue.

Last updated: Sep 19, 2017

ISSUE

Customers on Current Channel major version 16.0.8326.2062 are not able to edit shared calendars.

You might see the following error when trying to edit or add a new item on the calendar:

You don’t have permission to create an entry in this folder. Right-click the folder, and then click Properties to check your permissions for the folder. See the folder owner or your administrator to change your permissions.

Outlook error Shared Calendar

If you right-click the shared folder to check permissions, you see the following error:

Cannot display the folder properties. The folder may have been deleted or the server where the folder is stored may be unavailable. Cannot display folder properties. You don’t have appropriate permission to perform this operation.

Outlook error cannot display folder

Status: Fixed

The fix for this issue is being released in build 16.0.8431.2079. To install the update immediately, please go to File > Office Account > Update Options > Update Now.

Last updated: August 24, 2017

ISSUE

In Outlook 2016, you may experience the following scrolling problems:

  • When you scroll up or down, the view jumps to a different position after you finish scrolling.

  • When you delete a message, the focus jumps elsewhere in the view instead of jumping to the message before or after the deleted message.

See Version and build numbers of update channel releases.

STATUS

  • First Release for Deferred Channel: Fixed in Version 1705 (Build 8201.2171)

  • Deferred Channel: Fixed in Version 1701 (Build 7766.2099)

  • Current Channel: See workaround below.

WORKAROUND

For Current Channel, set these two registry keys that will disable the flight that is causing the scrolling issue:

HKEY_CURRENT_USER\SOFTWARE\Wow6432Node\Microsoft\Office\16.0\Common\ExperimentEcs\Overrides
DWORD: ofsatqrgsry3ri0
Value: 0

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\ExperimentEcs\Overrides
DWORD: ofsatqrgsry3ri0
Value: 0

Or you can open Notepad and paste the text below and save the file as .reg extension and then double click the file to import it into the registry:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\SOFTWARE\Wow6432Node\Microsoft\Office\16.0\Common\ExperimentEcs\Overrides]
"ofsatqrgsry3ri0"=dword:00000000

[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\ExperimentEcs\Overrides]
"ofsatqrgsry3ri0"=dword:00000000

Last updated: Sep 19, 2017

ISSUE

After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface.

Security update for Outlook 2007: September 12, 2017

Customers using the language in the first column may see parts of the page in the language listed in the second column:

Arabic

Swedish

Bulgarian

Brazilian Portuguese

Catalan

Brazilian Portuguese

Czech

Swedish

Hungarian

Swedish

Italian

Brazilian Portuguese

Kazakh

Brazilian Portuguese

Korean

Brazilian Portuguese

Latvian

Swedish

Norwegian

Swedish

Dutch

Swedish

Portuguese

Brazilian Portuguese

Slovenian

Swedish

Serbian Latin

Swedish

Thai

Chinese Traditional Taiwan

Turkish

Chinese Traditional Taiwan

STATUS: Fixed

This issue is fixed now.

Please follow the instructions in KB 4011086 to uninstall it, and then install KB 4011110.

Automated troubleshooting tools

Office Configuration Analyzer Tool 2.2 (OffCAT)

OffCAT diagnoses multitude issues, such as crashes, hangs, configuration issues, etc., and helps you detect problems with your Office programs or the Office programs on other computers you support (for example, in a Help Desk environment).

Support and Recovery Assistant

A tool available to Office 365 for business subscribers, the Support and Recovery Assistant for Office 365 will run a series of diagnostic tests on your computer and help you set up a new profile, or resolve other issues. If any of the tests fails, it will provide suggested solutions to get your problem solved.

Note: Support and Recovery Assistant for Office 365 is currently only available for use by Office 365 customers.

Calendar Checking Tool for Outlook (CalCheck)

CalCheck checks your Outlook calendar or general settings for problems, such as permissions, free/busy publishing, delegate configuration, and automatic booking. It also checks each item in your calendar folder for known problems that can cause unexpected behavior, such as meetings that seem to be missing.

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In Office 2016 on Windows 10, open an Office app, and click File > Feedback.

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