Continuous Sign In Message/BitLocker Loop - Old Work Account Conflict with Personal Account?

Question

My personal account will not stay logged in and continues to ask me to sign in but does not accept personal account credentials. Can' troubleshoot with the old business email, Microsoft says it does not exist.

Answer 1

The behavior matches a conflict between a personal Microsoft account and an old work/school account that used the same email address, plus repeated failed sign-ins causing loops.

Use these steps to stabilize sign-in with the personal account and avoid the old work account:

1. Confirm which account type is being used
   • When prompted with “Which account do you want to use?”, always choose Personal account for the home Microsoft 365/Windows scenario.
   • If the old work account was removed from Microsoft Entra/Office 365, trying to use it will fail with “account doesn’t exist” or similar.
   • If you try to use a personal Microsoft account to sign in to a business-only service, an error will appear because “You can only sign in to the Microsoft service that your account is set up for.”
2. Clear stuck sign-in sessions
   • Sign out of all Microsoft sites and apps.
   • Close all browser windows.
   • Open a private/incognito browser session and sign in only with the personal account.
   • If using a Microsoft site that supports both “Work or school” and “Personal”, explicitly pick the correct one when prompted.
3. Recover or verify the personal Microsoft account
   • If the personal account password is not accepted, use the official recovery options:
     • Reset a forgotten password: Reset your password.
     • If the password suddenly stopped working, use the Sign-in Helper tool.
     • If the username/email is not recognized, see My username has stopped working or use the Sign-in Helper tool.
4. Avoid using a work email as a personal Microsoft account going forward
   • New personal Microsoft accounts (MSA) generally cannot be created using a work/school email if that domain is hosted in Microsoft Entra. This prevents the overlap that causes the “Which account do you want to use?” prompt and sign-in confusion.
5. If the same email exists as both personal and work
   • Consider renaming the personal Microsoft account so it no longer uses the same email as the old work account:
     • Go to Manage how you sign in for the Microsoft account.
     • Add a new alias (for example, an outlook.com address) or use an existing email.
     • Set the new alias as Make primary.
   • This removes the conflict and should stop the repeated “Which account” prompts.
6. If sign-in loops continue on specific Microsoft sites
   • For support.microsoft.com and similar, ensure required domains (microsoft.com, support.microsoft.com, login.live.com, login.microsoftonline.com) are either all in or all out of the browser’s Trusted Sites list so cookies can be shared correctly.
   • If using Internet Explorer or Microsoft Edge with strict Trusted Sites rules, adjust them as described in the sign-in troubleshooting article.

If the old work account truly no longer exists in Microsoft Entra/Office 365, it cannot be used for troubleshooting or sign-in; focus all recovery and sign-in efforts on the personal Microsoft account and, if needed, rename it to eliminate the conflict.

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References:

• What's the difference between a Microsoft account and a work or school account?
• Which account do you want to use?
• I can't sign in to my Microsoft account
• Troubleshoot sign in issues for support.microsoft.com
• Troubleshooting suggestions for signing in to Visual Studio subscriptions
• Services Hub sign in FAQs
• Troubleshoot sign-in issues and account access problems