ActiveSync is a protocol developed by Microsoft to synchronize groupware data between a server and mobile devices such as smartphones and tablets. It can now also be used by Office programs such as Outlook 2013.

Most mobile devices contain an interface for synchronization of emails, contacts, appointments and tasks via ActiveSync. Since the protocol was first offered by the Microsoft Exchange Server, it can often be found on devices under the keywords such as "Microsoft Exchange Server","Exchange Server ActiveSync" or similar.

ActiveSync can be used with all Intra2net licenses that include the Mail Server function.