Synchronize your Global Address List (GAL) as mailbox contacts in the same environment with the help of contactSync.

Mail-enabled On-premise Active Directory objects can be synced to Exchange mailboxes in the same forest, and mail-enabled Office365 objects can be synced to Exchange Online mailboxes in the same Office365 tenant.

contactSync Supports on premise Exchange 2016, 2013, 2010, 2007 and Exchange Online.

Learn more about contactSync to Support on Premise environments