I'm running into an issue. I've a domain, for example abcdef.com currently in one tenant. We're only using Office365 for e-mail purposes. There are 5 users using this domain name and I have to move this domain to another tenant. The users log in with their e-mail address on Windows 10.
So what I've done:
Changed the passwords of the users to make an export of their mailboxes
Saving all mailboxes as .PST file
Deleted the domain and users in the old tenant
Added the domain and users in the new tenant with exactly the same user accounts
My current issues:
When trying to login from an existing PC on the network, I get an error telling me that the username and password is incorrect. Of course I've changed the passwords in the new tenant, but I cannot login. Logging in on a fresh install of Windows 10 works fine, and I was able to restore the mailboxes there.
Sending an e-mail from an Hotmail.com address to a migrated mailbox doesn't seem to work. The e-mail doesn't arrive, and also doesn't bounce.
The TTL of the DNS is set to 3600. I'm now two hours after changing the DNS records, and still the e-mail's don't arrive and the users cannot login to their current PC's, also not with their new passwords.
Any clues how to fix this?