AD Azure connect is syncing the local AD and Azure. All mailboxes have been migrated. My understand is that we have to purchase as many CALs as number of mailboxes we have, no matter where the mailboxes are stored (on premise or Office 365) As we no longer run anything on the on premise Exchange I would have liked to decommission the server.
But it looks like we need to run at least one one premise Exchange to keep syncing some attributes.
Workaround is not supported by Microsoft.
Is there something we could think of to get rid of the on premise Exchange?