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FIX: Microsoft Teams Not Syncing (Full Guide)

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Microsoft Teams can be used from the desktop but it is a chat, video conferencing, and collaboration tool which means you need an internet connection. The internet connection allows you to send and receive messages, and interact with other members of your team but it also syncs information e.g. changes you’ve made to a file, edited messages, and the read/unread status of messages.

Microsoft Teams Not Syncing

If Microsoft Teams doesn’t sync, you’re essentially unable to use most of the app’s features. Syncing may not work for some features e.g. files, or it may not work at all. Regardless, it needs to be fixed. Users complain that while the app syncs messages sent from the desktop or web version, messages that are sent from the iOS or Android apps do not sync.

1. Sync check – Desktop

To check if Microsoft Teams is syncing on the desktop or not, look at its system tray icon.

  • If you see a green badge on the icon, it means the app is syncing.
  • If you see a red badge, it means the app is syncing, and you have unread items.
  • If you do not see a badge on the icon at all it means Microsoft Teams isn’t syncing.

2. Clear app data – Mobile app

If Microsoft Teams is syncing on the desktop, the problem likely lies with the iOS or Android apps. Make sure you have a strong internet connection on your phone and then try the fix below.

  1. Open Microsoft Teams on your phone.
  2. Tap the hamburger icon at the top left.
  3. On the navigation drawer, tap Settings.
  4. On the Settings screen, tap ‘Data and storage’.
  5. On the Data and storage screen, tap ‘Clear app data’.
  6. Wait until you see a little ‘Done’ message appear next to ‘Clear app data’.
  7. Return to the main Settings screen, and tap Log out at the very bottom.
  8. Quit the app.
  9. Open it again, sign in, and the messages, files, etc,. will all sync.

3. Send message from desktop

Messaging apps tend to sync regularly but sometimes, the sync service can run into trouble and the easiest way to trigger it again is to force it to receive a message instead of sending one.

  1. Sign out of the Microsoft Teams desktop and web app.
  2. Make sure you’re signed into the Microsoft Teams app on your phone.
  3. Have someone send you a message, or initiate a call yourself.
  4. Wait for the message or call alert to go through. 
  5. Once it does, the messages will sync as well.


Syncing is essential for messaging apps but with complex apps like Microsoft Teams that integrate Sharepoint, Exchange, and OneDrive including the Microsoft 365 suite of apps, you do run into trouble now and then. The fix is simple though; clear app data and force the app to communicate with its online servers.

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