trying to login outlook on my mobile. cannot sign in

Since reinstalling did not stop the sign-in loop, clear Outlook’s remaining Android sign-in data and browser authentication cookies before adding the account again.

Reset the Android sign-in state

Clearing app data removes Outlook’s local settings and downloaded content from the phone, but it does not delete mail stored in the mailbox.

1. Open Android Settings → Apps → Outlook.
2. Select Storage or Storage & cache.
3. Tap Clear cache, then Clear data/Clear storage.
4. Open Chrome → Settings → Privacy and security → Delete browsing data.
5. Select Cookies and site data and Cached images and files, then delete them.
6. Restart the phone.
7. Open Google Play Store and install any available updates for:
   • Microsoft Outlook
   • Google Chrome
   • Android System WebView
   • Google Play services
8. Open Outlook, select Add account, and enter the complete email address.

This reset sequence is documented in a closely matching Android case where reinstalling Outlook did not restore sign-in.^1^ Microsoft also recommends clearing Outlook’s cache and updating the app for Android problems.^2^

Test the account separately

Before trying Outlook repeatedly, sign in through the phone’s browser at Outlook.com or the Microsoft account website.

• Browser sign-in works: the password and account are valid; retry Outlook after completing the reset above.
• Browser sign-in also fails: use the recovery route corresponding to the account type below.
• Two-step verification appears: approve it in Microsoft Authenticator, by SMS, or with the configured verification method.

Choose the correct account recovery path

Microsoft’s sign-in guidance differs by mailbox provider:^3^

• Personal Microsoft account (@outlook.com, @hotmail.com, or @live.com): run Microsoft’s sign-in helper from the cited support page. It checks for account and credential problems.
• Microsoft 365 work or school account: use your organization’s self-service password reset if enabled. Otherwise, contact the Microsoft 365 administrator, because organizational authentication or access policies may require administrator action.
• Gmail, Yahoo, iCloud, or another provider: verify the account with that provider because Microsoft does not manage its password or security settings.

If the loop continues after browser sign-in succeeds and the Android sign-in state has been cleared, open Outlook and go to profile picture → Settings → Help & Feedback → Contact Support. If Outlook does not remain open long enough to reach that menu, use the Microsoft support options on the Outlook mobile sign-in page.^3^

References

1. I have a Microsoft 365 account but Outlook no longer works on my Samsung Galaxy tablet - Microsoft Q&A
2. Troubleshoot Outlook mobile issues | Microsoft Support
3. Can't sign in to the Outlook mobile app | Microsoft Support