Applies ToOutlook.com New Outlook for Windows Outlook on the web for Exchange Server 2016 Outlook on the web for Exchange Server 2019

If one of your devices isn't sending or receiving email, removing the partnership between the mobile device and your mailbox can help fix sync issues.

Important: If your Microsoft cloud storage is full, you cannot send or receive email. We're sorry, but messages sent to you while your storage was full are bounced back to the sender and are unrecoverable. Check your mailbox storage to see what's taking up space. Learn more about recent changes.

  1. Go to Settings  > General > Mobile devices.

  2. Select your device in the list, and then select Delete to delete the device partnership.

  3. At the top of the window, select Save.

  4. Go to your mobile device and power it off completely.

  5. Restart your mobile device after a few seconds, and then sync your mailbox again.

If these tips don't help, try our interactive troubleshooter.

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If the instructions don't match what you see, you might be using an older version of Outlook on the web. Try the Instructions for classic Outlook on the web below.

  1. Sign in to Outlook on the web.

  2. Choose Settings  > General > Mobile devices.

  3. Select your device in the list, and then select Delete to delete the device partnership.

    A screenshot of the Delete button on the Mobile devices page

  4. At the top of the window, select Save.

    If you only want to remove this device from the list, stop here. If you're attempting to fix a sync issue, continue with the remaining steps.

  5. Go to your mobile device and power it off completely.

  6. Restart your mobile device after a few seconds, and then sync your mailbox again.

  1. Sign in to Outlook on the web.

  2. Choose Settings Office 365 setttings button - looks like a gear next to your name next to your name in the upper-right corner of the page, and then click Mail.

  3. In the left navigation bar, under General, choose Mobile Devices.

    General > Mobile Devices

  4. Select your phone in the list, and then select Remove to delete the device partnership.

    Remove phone from Outlook Web App

  5. Select Yes in the confirmation box.

    If you only want to remove this device from the list, stop here. If you're attempting to fix a sync issue, continue with the remaining steps.

  6. Go to your mobile device and power it off completely.

  7. Restart your mobile device after a few seconds, and then sync your mailbox again.

  1. In new Outlook, choose Settings  > Accounts > Mobile devices.

  2. Select your device in the list, and then select Delete to delete the device partnership.

  3. At the top of the window, select Save.

  4. Go to your mobile device and power it off completely.

  5. Restart your mobile device after a few seconds, and then sync your mailbox again.

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