Fixes or workarounds for recent issues on Outlook.com

This article is for Outlook.com. If you're using Outlook for Windows, see Fixes or workarounds for recent issues in Outlook for Windows.

If you're having problems accessing Outlook.com, you can see the status of Microsoft Office Online Services at the Service Health portal.

Last updated: February 7, 2018

Outlook.com issues affecting email messages, attachments, and features

Last updated: February 15, 2018

ISSUE

You may get a "mail not accepted" error when you send email from outlook.com, hotmail.com, live.com, or msn.com email addresses to Italian email accounts ending in @alice.it, @tin.it or @tim.it.

STATUS: INVESTIGATING

We are working with the ISP in Italy to fix this issue.

Last updated: February 15, 2018

ISSUE

You may get this error when sending emails using your "Send Only" connected account:

"Something went wrong and we haven't been able to send your message yet."

STATUS: PENDING

This is a known issue and will be fixed in a future build.

ISSUE

The status of some connected accounts shows as “Update in progress error”. The delivery of connected account email may not be affected.

STATUS: PENDING

This is a known issue and will be fixed in a future build.

ISSUE

Email sent from your connected account shows as being sent on behalf of your Microsoft account.

WORKAROUND

This is a known issue and will be fixed in a future release. Until then, you can change your From address to be the same as your primary Microsoft account alias.

For more information, read how to fix Outlook.com sends email "on behalf of" my email address.

ISSUE

Cleaning up a large number of duplicate or similar contacts does not work.

WORKAROUND

This is a known issue and will be fixed in a future release. Until then, you can still clean up contacts, but we recommend cleaning up in batches of fewer than 50 contacts at a time.

For more information, read how to Clean up or remove duplicate contacts in Outlook.com.

ISSUE 

Links in Outlook.com email messages don't work when they're viewed in Firefox browsers.

WORKAROUNDS 

Mozilla is working on a fix for Firefox, but until then:

  1. Please use Microsoft Edge or another web browser.

  2. Use the Outlook.com beta. Learn more about the Outlook.com beta

  3. View email in the reading pane. For more information, read how to Change the look of your Outlook.com mailbox.

ISSUE

Some users are currently experiencing issues when replying to email or composing new email when using Google Chrome with the AdBlock extension. The To, From and Subject fields do not appear.

WORKAROUNDS

  1. Use Microsoft Edge or another web browser.

  2. Exclude Outlook.com from the AdBlock settings. At the top right corner of Google Chrome, select AdBlock and then select Don’t run on pages on this domain. Refresh your browser to load Outlook.com again.

ISSUE

If email sync is slow, or you are not able to send or receive emails, this might be due to delays in syncing some connected accounts. We are aware of the issue and a fix will be released soon.

Notes: 

  • The "last update" time may not reflect the last time you received email from your connected account.

  • Disconnecting and reconnecting your connected account may not help syncing.

WORKAROUND

Use the free Mail for Windows 10 app to send and receive email from your connected account. Read how to Set up email in Mail for Windows 10

Outlook issues after connecting Outlook to Outlook.com

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: 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

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