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How to Fix Microsoft 365 Error 2603 on Android
Question details
The user is trying to resolve Microsoft 365 Error 2603 on an Android device to regain access to Office applications.
- Product
- Microsoft 365
- Device & OS
- Android
- Scenario
- Signing into or syncing Microsoft Office applications on an Android mobile phone or tablet.
- Observed behavior
- The app displays Error code 2603. The issue persists even after reinstalling the app, restarting the device, clearing app caches, or switching networks.
Ensure you have your correct Microsoft account credentials (email and password) ready, as you will need to sign back in after clearing the account from your device settings.
Remove and Re-add Your Microsoft Account via Android Settings
Clearing the account from the system's sync settings often resolves hidden synchronization conflicts that trigger Error 2603.
Force close any running Microsoft 365 or Office applications on your Android device.
Navigate to the Android 'Settings' app, then scroll down and tap on 'Accounts and Sync' (or 'Passwords and accounts', depending on your device manufacturer).
Select 'Work Sync' or find the specific Microsoft account experiencing the error. Tap on the account, open the menu (three dots), and select 'Remove account'.
Restart your Android device completely. Once restarted, open the Microsoft 365 app and attempt to sign in again with your credentials.
Disconnect Linked Accounts and Create a New Alias
Linked accounts, such as a Samsung account, or problems with your primary email alias can sometimes cause authentication failures on mobile devices.
Troubleshoot Network and Verify Browser Access
Testing your account in a mobile browser helps determine if the issue is restricted to the Android app or related to the network connection.
Try WPS Office for a Hassle-Free Mobile Experience
If Microsoft 365 sync errors like Error 2603 keep interrupting your workflow on Android, consider switching to WPS Office. It is a lightweight, fully functional alternative that allows you to easily edit documents on the go without being forced into complex account synchronizations.
Frequently Asked Questions
What causes Microsoft 365 Error 2603 on Android?
Error 2603 is typically caused by account synchronization conflicts on the Android operating system, corrupted authentication tokens, or conflicts with linked manufacturer accounts (such as a Samsung account).
Will removing my Microsoft account from Android Settings delete my files?
No. Removing the account from your Android 'Accounts and Sync' settings only clears the local login and sync data. Your documents remain safely backed up in OneDrive or your device's local storage.
Why does Microsoft 365 work on Windows but give Error 2603 on my Android phone?
This happens because the error is specifically related to Android's mobile account management system or app-level authentication. Your actual Microsoft subscription remains active and healthy, which is why it continues to work properly on Windows 11.
