MDaemon Email Server includes support for the latest version of Microsoft Exchange ActiveSync (EAS) (2.5, 12.1, 14.0, 14.1, and 16.1 Protocols), which is a separately licensed ActiveSync (AirSync) server. ActiveSync provides native synchronization of a user's default and shared email, calendar, contacts, and tasks data between the MDaemon Email Server, MDaemon Webmail, Outlook (using MDaemon Connector for Outlook), and an ActiveSync capable device. Other features include: Server-Side Mail Searching, Customizable Device IT Policies, Remote Wipe, Autodiscovery, Multiple Folder Synchronization, Global Address Lookup, SSL Encrypted Transmissions, Device Whitelists and Blacklists, Forgetting Inactive Devices, and Device Protocol Restrictions.

ActiveSync provides the highest level of integration for the latest mobile devices, including iPhone / iPad, Android, and Windows Mobile / Windows Phone. It is also available on most other mobile platforms. ActiveSync also minimizes the amount of data that is sent over the mobile network.