Managing external identities to enable secure access for partners, customers, and other non-employees
Hello Michael Lauretta,
This behavior is expected if the account was changed from internal (member) to external/guest or vice‑versa, as it impacts how the user is authenticated in Entra ID.
When this change happens, the original sign-in context (UPN / identity provider) may no longer match, which leads to token errors while accessing Azure portal.
If the issue still persists, note that simply changing the UserType back does not fully revert the authentication flow. In such cases, the recommended approach is to:
- Properly convert the account back to internal, or
- Recreate the account and reassign roles/permissions
If this is the only Global Admin account and access is blocked, please let us know