“This mailbox server is responsible for generating an offline address book”
I was trying to uninstall Microsoft Exchange 2013 after moving to Exchange 2016 but kept getting the error “This mailbox server is responsible for generating an offline address book” in the Readiness checks.
I ran ‘Get-Mailbox – Arbitration’ to verify all the mailboxes had been moved.
Nothing appeared to be pointing at the old server and I could not find any mailboxes on the server.
In the end I ran ADSIEdit and found under Configuration > services> Microsoft Exchange > First Organisation> Address List Container > Offline Address Lists that the Offline Address Book had a reference to the old server. Continue reading