An error occurred while saving the commentPhil Williams commented
I have a variation on this issue that is driving me mad!
Basic Hybrid setup not full
I create a brand new Shared mailbox in O365 and configure it. Everything is fine.
Then when the next sync hits a new 'in cloud' unlicensed user appears in the Active users view with a name that matches my new shared mailbox.
Is this expected and OK or are my shared mailboxes going to vanish after the grace period?
account does not exist ii AD and never has... so what's happening here ?