Fixes or workarounds for recent issues on

Last updated: November 2016

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 accounts ending in,,, or

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.



Outlook Mail menu bar

If you do not reconnect to your upgraded account you may experience one or more of the following issues: email and calendar sync issues, missing or renamed folders, hidden folders becoming visible, issues searching for email or contacts, issues with autocomplete for contacts, as well as additional unintended recipients or attachments from other messages in that folder getting added to email replies.

If after migration you see any of these problems, please visit this article for workarounds.

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:

When you try to login to your mailbox that connects to an Exchange Server, you might receive a "Something went wrong" page, with this error DatabaseNotFoundException.

To resolve this issue, login to your account using this link:
If you still get the error, add an alias to your account, (if you don’t already have one) and use that alias as your primary alias.

To learn more about aliases, see Add or remove an email alias in

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.

You may not receive attachments in emails that are sent via Multimedia Messaging Service (MMS) from a phone to your email address.

A fix has been identified for this issue, and will be rolling out this month.

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 re-connect 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

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

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

  2. Under Recent Activity find the Security challenge event that matches the most recent time you received the connection error and click to expand it.

  3. Click 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?.

We are aware of an issue where multiple blank contacts are being created in the default Android mail app on Android devices. We are in the process of releasing a fix at this time. In order to receive the fix, you must perform the following steps:

  1. Login to your account at

  2. Select the gear icon in the top right corner.

  3. Select Options from the drop-down menu.

  4. Select General from the menu on the left of the page.

  5. Select Mobile Devices.

  6. Highlight the device that is experiencing the issue.

  7. Select "-" icon from the row above the list of devices and confirm the removal.

Following these steps will clear the blank contacts on your next device sync.

Windows Phone may encounter error 0x8500201D when syncing with email. We are aware of this issue and a fix will be out very soon. We apologize for any inconvenience this may cause.

Note: You can still access your email via your web browser at

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:

We are aware of an issue where email addresses are displayed instead of contact names in contacts lists. Our engineering team is currently investigating this and we hope to have a fix deployed soon. We appreciate your patience while we work to resolve this issue.

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.

Need more help?

Call support

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


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

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