Fixes or workarounds for recent issues on

Last updated: February 2017

Important Announcement

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

Earlier this year we introduced the new, 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 account has been upgraded, you’ll need to reconnect Outlook 2016 or Outlook 2013 to your 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 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 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

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

Note: This change only affects any 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 account on the web via any popular web browser.

Outlook issues after connecting Outlook to

Last updated: January 9, 2017


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


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


When adding account either automatically or manually, Outlook 2016 or Outlook 2013 crashes.


We are actively working on a fix. In the meantime, you can add your account using the Control Panel Mail Applet:

  1. Go to the Control Panel.

    • Windows 10: Click on the Windows Search Bar and type "Control Panel".

    • Windows 8 or 8.1: Type Win+X, then click Control Panel.

    • Windows 7, Vista, or XP: Start > Control Panel.

  2. In the Search box at the top of the window, type "Mail" and click on the Mail icon.

  3. Choose Show Profiles... > Properties.

    Mail Setup - Outlook dialog box that is accessed through Mail settings in the Control Panel

  4. Click Email Accounts... and then in the Account Settings dialog box, click New...

  5. Choose E-mail Account, and then enter your name.

    The Add Account dialog box

  6. Enter the address and password of the email account that you want to add.

  7. Retype your password, and choose Next.

  8. When you see Congratulations! in the window, choose Finish.


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

  • Your email account name shows up as outlook_[long series of letters and numbers] 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] 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 on the web works correctly and emails will be sent with the correct email address.


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 and sign in to your account.

  2. Set your email as the primary alias.

  3. Remove any old non-Microsoft account listed as primary alias that you are not using.

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

Last updated: January 24, 2017


When sending email to a Contact Group in Outlook, Outlook displays an error “An unexpected error has occurred."

Outlook error "An unexpected error has occured."


We are actively investigating this issue. As a workaround, you can click the + icon to expand the Contact Group and then send the email.

Last updated: January 24, 2017


When sending email to any contacts from your address book in Outlook, some recipients receive a winmail.dat file attachment that shows up in some clients such as Gmail and Yahoo web mail. In Outlook, the attachment icon is displayed but no attachment shown.

Outlook attachment icon


We are currently investigating this issue. This issue does not occur when sending emails from on the web or using Outlook app for Windows mobile or iOS.

Last updated: January 24, 2017


Contacts stored in Outlook with connected accounts lose their information entered in the Company name field after syncing to server.


We are currently investigating this issue and will provide an update as soon a fix is in place.

Last updated: January 24, 2017


When replying to an email with multiple recipients, your email address gets added to the To line.


We are currently working on fixing this issue. In the meantime, please manually delete the added email address entry before clicking the Send button. We understand this is an inconvenience but we will provide an update as soon as the fix has been released.

Last updated: January 24, 2017


If you have multiple email accounts connected in Outlook, the account always becomes the default sending "from" account when replying or forwarding from another non-Outlook account (such as Gmail or Yahoo).


We are investigating a solution for a future update. In the meantime, you can use the following workarounds:

Workaround #1:

Manually change the From drop down filed to the other account. In the message window, above the To button, click From, and choose the account you want to use.

Workaround #2:

Add an empty data file and make it the default.

Note: If you use this workaround and are using another account other than the account, creating new items like Calendar, Contacts, and Tasks will get created in the new Data File. However, if you are using the account, those items will get created in the accounts respective folder.

  1. In Outlook, click the File tab.

  2. In the right pane, click Account Settings, and then click Account Settings.

    Options available when you choose account settings in Outlook
  3. Click the Data Files tab and then click Add, and choose Outlook Data File (.pst).

  4. In the File name field, name the Outlook Data File (.pst) or leave the default name and click OK.

  5. On the same Data Files tab, choose the new Outlook Data File (.pst) and click Set as Default.

  6. Close and then restart Outlook.

When Outlook opens back up, you will see the new account Data File listed like your other accounts.  In the left Folder Pane, you can drag the Data File below your other email accounts to get it out of the way.

Last updated: February 8, 2017


If Outlook is connected to a primary 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 account.


Outlook supports sending from a secondary connected account for Microsoft owned domains such as,, 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 connected. In the meantime, please use the following workaround:


You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in 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


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


  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


    Points to


    CNAME (Alias)


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



    IP Address



    60 min

    Backlist Check

    SMTP Test issues affecting email messages, attachments, and features

You might see this error if your primary alias's name is the same as an existing work or school account in Office 365 or Azure Active directory.

To resolve this error, try any of these steps:

For more information, go to the ADDriverStoreAccessNonLocalException troubleshooting article.

This error could occur if you have a non-Microsoft email address as the primary email address on your account.

To resolve this issue, set your Microsoft email address as the primary email address:

  1. Sign in to the Microsoft account website.

  2. Select Your info.

  3. Select Manage your sign-in email or phone number.

  4. Select Make primary next to the alias you want as your primary. The alias has to be a Microsoft email address, such as an email account that ends or or

To learn more about managing your aliases, go to Manage aliases on your Microsoft account.

These instructions only apply if you have connected your account to an Office 365 work or school mailbox via Outlook on the web. As part of the upgrade, we will be moving you to a more secure and reliable infrastructure. Once your account has been upgraded, your email will stop syncing to your Office 365 mailbox.

To resolve this issue, follow these steps to reconnect your account:

  • Wait until you have been migrated to the new To check if you have been migrated, read this Get help with article.

  • Log in to Outlook on the web to access your Office 365 work or school account.

  • Choose Settings (the cog wheel at top right corner)> Mail > Connected accounts to access the connected accounts options page.

  • Select your connected Outlook account and click the trash can icon to delete it.

  • Reconnect your Outlook account by clicking on the plus (+) icon.

For more detailed instructions on how to add a connected account, go to Connect email accounts in Outlook on the web (Office 365). If you experience any other issues, use the Contact Us link at the bottom of this page to contact support.

We apologize for the temporary inconvenience this may cause and we're excited for you to enjoy the benefits of the new

If you're trying to add a Google Connected account to your account using POP, you may have encountered an error. This is due to security settings that is preventing the connection. Please follow the instructions from Google detailed in this article:

Please follow these steps, one at a time, to fix issues with your POP account. If these steps don't help resolve your issue, please search for your specific issue in the community forums or contact support.

Step 1: Update your POP account settings

  1. Go to

  2. Sign in with your Microsoft account.

  3. Under Manage your connected accounts, find your POP account. A status of "Update failed" should appear next to the POP account with issues.

  4. Double-click the account or select the account and click on the pencil icon to get to the Edit connected accounts page.

  5. Update the account password and click Save.

  6. The account status should now show "Pending update" and should eventually change to "Up to date".

If the account status is stuck on "Pending update" for a long period of time, or it changes to "Update failed", or it changes to "Up to date" but you continue to experience issues, try the next step.

Step 2: Enable mail provider settings

If updating the password for the connected POP account didn't resolve the issue, you may need to change certain mail provider settings to enable a connection that could be blocked.

If you're mail provider isn't blocking the POP connection or following the unblock steps doesn't work, try the next step.

Step 3: Remove the connected POP account and reconfigure it as an IMAP connection

If the first two steps don't help resolve the problem, and your email server supports getting emails through IMAP, you should consider switching to IMAP instead. IMAP provides several advantages over using POP, including the ability to sync changes across all your devices and to all of your mail folders (not just the Inbox). To remove the failing POP account and add IMAP, follow these steps:

  1. Go to

  2. Sign in with your Microsoft account.

  3. Under Manage your connected accounts, select the POP account and click on the trash icon to remove it.

  4. Click Yes in the Remove connected account? dialog box.

  5. Once the account is removed, try adding it again and select Create a new folder for imported email, with subfolders like the account you connect option under the You can choose where the imported email will be stored section.

If none of these steps help resolve your issue, please contact support for further assistance.

Connection error: You may receive a connection error if you configured your account as IMAP in multiple email clients. We’re working on a fix and will update this article when we have more information. For now, try the following workaround:

  1. Go to and sign in using the email address and password of the affected account.

  2. Under Recent activity find the Session Type event that matches the most recent time you received the connection error and click to expand it.

  3. Select This was me to let the system know you authorize the IMAP connection.

  4. Attempt to connect to the account via your IMAP client.

    For more information on how to use the Recent activity page, go to What is the recent activity page?

GoDaddy accounts: If you use to access a non-Microsoft domain (such as, you might not be able to sync your accounts using IMAP. To resolve this, remove the connected IMAP account in and reconfigure it as a POP connection. For instructions about how to reconfigure your GoDaddy domain, go to Set up your email address with POP.

If none of these steps resolve your issue, or you need to have IMAP enabled (it's disabled by default), contact GoDaddy support.

To learn more about IMAP and POP, see What are IMAP and POP?

Need more help?

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You can contact a support agent on the Microsoft Contact Us page.


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You can find self help topics from getting started to troubleshooting on this Get help with article.

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