If you have a user who has signed in with one identity provider (e.g. Google) and you wish to change them to another (e.g. Microsoft Azure), or, the user’s email has been changed, use the ‘Update User Identity’ feature. This will disconnect the user from their existing identity provider, and, on their first new sign in, they will be adopted by the new one. Once you have selected thhis option you may change the user’s Email or switch them to a different identity provider.