We are currently going through a rebrand. We had SSO configured with our original domain, i.e. user was email@example.com and are currently going to change to firstname.lastname@example.org. On the Azure side there is nothing we have to do other then to update the UPN. However when we do that, and then attempt to login via SSO it attempts to create a new user instead of recognizing the existing profile and local mac user.
Is there a) away to fix that or b) allow for remapping so that the user will be able to select their account to attach to their new UPN?