Keeping guest account in the inviting AAD updated with changes made in the user's home AD
We're collaborating with an external party on a project and have invited around a 100 users of theirs as guest users in our AAD. The external party recently migration to another email domain. The good news is that this change didn't impact their ability to SSO into SharePoint and other O365 products. The only downside we found is that the user name filed of the guest account in the inviting AAD still had the original email.
In summary, users added pre-migration have the old email domain suffix and users added post-migration have the new email domain suffix. I would be nice if the guest account in the inviting AAD updates accordingly.