I want to use AD Connect only to sync AD information and not Exchange info for I'm migrating on premise Exchange to Office 365, however, I'm using a 3rd party tool to migrate.. This being CodeTwo Office 365 migration.. So.. Here's where I'm at.. AD Connect synced users to Office 365 Online Exchange, however, the mailbox isn't created yet for it assumed I'm migrating via AD connect and not my 3rd party tool.. So.. On the user details page I get the below message. I found a few articles stating to not sync the ExchangeGUID, however, the accounts are already synced. So.. What should I do?
This user's on-premises mailbox hasn't been migrated to Exchange Online. The Exchange Online mailbox will be available after migration is completed.