A site was shared with an external user, email@example.com. But, when they clicked the link to accept the invitation they were at home logged into their personal account, firstname.lastname@example.org. Of course, this means that this personal Microsoft account will show up in the system for who modified files, etc. They would rather use their corporate office 365 account, email@example.com.
What is the process for changing this association? Perhaps I need to fully delete the user account from Azure AD and start over? Anyone have a specific process for this?
This issue is raised in the uservoice forums, but I'm hoping the given answer from 5 years ago isn't current.