@Turboon-7101 Were you easily able to get this resolved? I am going through the exact issue now... had a "Work Account" forever using my company domain name. Just started our e-mail migration and hooked in AD Connect. Now it says my account doesn't exist. My biggest issue is that I have dozens upon dozens of clients Open Licenses in my account. I can't lose this access. Any input/advice you may have after going through this would be hugely appreciated! Just want to be prepared for any response they may have.
Thanks!