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// entra id sign-in error · accounts, passwords and sessions

AADSTS16001

UserAccountSelectionInvalid

What Microsoft says

You see this error if the user selects a tile that the session select logic has rejected. When triggered, this error allows the user to recover by picking from an updated list of tiles/sessions, or by choosing another account. This error can occur because of a code defect or race condition.

How to fix it

Microsoft doesn't publish a specific fix for this code beyond the description above. This site groups it under accounts, passwords and sessions, based on that description, so start with the steps below.

How to investigate

  1. Confirm which account the user actually signed in with. A personal account or the wrong tenant causes many of these.
  2. Check the user object: enabled, licensed, in the right tenant, and with no recent password change or reset.
  3. Look at the sign-in logs over a few days for a pattern, such as repeated failures from one IP address.
  4. Search the sign-in logs for the request ID or correlation ID from the troubleshooting details on the error page.

Tools that help

Common errors: Accounts, passwords and sessions

The description is quoted from Microsoft's error code reference. The grouping and investigation steps are this site's guidance.