MDaemon - Email Server Software for Windows
https://mdaemon.co.nz/Products/ActiveSync/
MDaemon Messaging Server* includes support for the latest version of Microsoft Exchange ActiveSync (EAS) (2.5, 12.1, 14.0, and 14.1 Protocols), which is a separately licensed ActiveSync (AirSync) server. ActiveSync provides native synchronization of a user's default email, calendar, contacts, and tasks data between the MDaemon server, WorldClient (MDaemon's web-based email client) or Outlook ...
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