Outlook Mobile App Contacts Sync
Outlook Mobile App
When updating your mobile phone or the Outlook app, the app's settings may revert to their default state, causing a disruption in the synchronization between your device's contacts and Outlook. Fortunately, there are simple steps you can follow to resolve this issue and restore proper sync functionality.
Launch the Outlook app on your mobile device.
In the app, tap the Settings icon (usually represented by a gear icon).

Scroll down and tap on the email account that you are experiencing the sync issue with.

Ensure that the Sync Contacts toggle is turned on. This ensures that your contacts are properly synced between your phone and Outlook.

After enabling sync, return to the main screen and check if the issue is resolved. Your contacts should now sync correctly.
If the issue persists after following these steps, try restarting your phone or reinstalling the Outlook app. If the problem continues, consider reaching out to Outlook support for further assistance.