Forum Discussion
Exchange changes not propagating back to 365, but only for one account
So, I have a Tenant where, for reasons known only to previous admins, when company rebranding occurred, rather than setting up the new email addresses as aliases on the existing user mailboxes, a new...
I don't seem to be able to edit my post to get around the "helpful" redaction of completely made up emails. (How many people are actually called "person"?)
Anyway, in step (1) it is person at otherdomain, and then the paragraph after the list I am saying that
oldomain is still an alias on person at otherdomain, so I can't add it as an alias to the newdomain mailbox.
Did you check for the UPN?
