Based on similar Outlook-for-Android login issues on Samsung devices, the most effective fix is to completely remove and reinstall the Outlook app (and any related Microsoft apps) on the Samsung phone, then sign in again from scratch.
Recommended steps:
- On the Samsung phone, uninstall the Outlook app.
- If Microsoft Teams is also installed and using the same account, uninstall it as well (they can share sign-in components).
- Restart the Samsung phone.
- Reinstall Outlook for Android from the Google Play Store.
- Open Outlook and add the account again using the normal sign-in flow.
If sign-in still fails in Outlook after reinstalling, test the account in a browser on the Samsung phone (for example, by signing in to Outlook on the web). If browser sign-in also fails, follow the guidance for general Outlook mobile sign-in problems:
- For a Microsoft personal account, use the sign-in helper to detect and fix account issues: Start.
- For a work or school account, use the Reset password link if allowed, or contact the organization’s IT admin.
If the account signs in successfully in a browser but not in the Outlook app after a reinstall, the problem is most likely with the app environment on the device, and continuing to use Outlook on the web or contacting Microsoft support would be the next step.
References:
- Troubleshoot Outlook mobile issues
- Can't sign in to the Outlook mobile app
- NoSuchAccountException: Login Error
- Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps
- Can't sync calendar and contacts with my phone or tablet
- Cannot login to my outlook account from iphone even though details are correct - Microsoft Q&A
- Why can't I log in to my Outlook account? - Microsoft Q&A
- Correlation Id: [Moderator note: personal info removed] Timestamp: 2025-11-06T00:32:06.000Z DPTI: [Moderator note: personal info removed] 7 Message: An unexpected error occurred. Tag: 4oggx Code: 1864098253 - Microsoft Q&A