12:11:28 Synchronizer Version 11.0.8200
12:11:28 Synchronizing Mailbox 'Kym Thomas'
12:11:28 Microsoft Exchange offline address book
9:44:33 Synchronizer Version 12.0.6315
9:44:33 Synchronizing Mailbox 'Paul Morris'
9:44:35 Microsoft Exchange offline address book
These can commonly be caused by the SSL check box being checked on the OAB virtual directory. This requires an iisreset to undo.