GALsync

About GALsync

With GALsync, you can easily and affordably exchange mail-enabled items. Users in one or both messaging organizations can benefit from access to other Active Directory users and groups by sharing things between their respective directories. By syncing your Global Address List (GAL), you can trade email-enabled assets with other Exchange organizations or even Exchange Online. The users of both mail services will have access to each other's user and group information.