What should be done if an administrator cannot log in due to a change in their unique identifier?

If an administrator cannot log in due to a change in their unique identifier, the appropriate response is to clear the Federated ID. When a user's unique identifier changes, particularly in a federated login system, their existing login credentials tied to the old identifier may no longer function. Clearing the Federated ID allows the system to potentially recognize the updated unique identifier and enable the administrator to log in successfully.

In this situation, updating the user profile manually or resetting the password might not resolve the issue if the account's structure fundamentally relies on the unique identifier for authentication. Re-inviting the user is also not necessary as it might not address the core issue related to the change in the unique identifier. Therefore, clearing the Federated ID directly addresses the login issue by re-establishing the connection between the administrator's identity and their access permissions.