Intellectual Property Licensing

Exchange ActiveSync Protocol

The Exchange ActiveSync protocol allows mobile devices running Windows Mobile to synchronize e-mail, calendar, contacts, and tasks (known as PIM, Personal Information Manager) over the air with the Microsoft Exchange Server.  The sync protocol is the language spoken between the mobile device and messaging server to synchronize objects. The device will have its own e-mail, contacts, calendar and task (PIM – Personal Information Manager) application, which provides a user interface and data storage. Syncing is the process of reconciling differences between data stored on the mobile device and stored on the Exchange Server. Both the mobile device and the Exchange Server maintain their own collections of objects and track changes made since the last sync. The mobile device may initiate a new sync by sending a set of updates to the Exchange Server and requesting the Exchange Server respond with its own updates. The Exchange server processes updates it receives, resolves any conflicts, and sends its list of changes back to the mobile device.   Microsoft licenses the patents for Exchange ActiveSync please contact us for more information. 

For more information about Microsoft's implementation of Exchange ActiveSync, please see the Microsoft Exchange features - email for business page. For information about the protocol, see the Exchange ActiveSync overview and the Exchange Server Protocol Documents.

Current Exchange ActiveSync Protocol Licensees include: 

  • 9Folders Inc.

  • Apple Inc.

  • Asus Tek

  • Atmail

  • Avaya

  • BlackBerry

  • Citrix

  • Cre8

  • Critical Path Inc.

  • DataViz Inc.

  • Daum Communications

  • Dell

  • Deutsche Telekom AG


  • Enterproid


  • Fiberlink Communications Corporation

  • Fixmo

  • Gecad Technologies

  • Google Inc.

  • Helio LLC

  • HTC Corporation

  • IceWarp Limited

  • iKonic Apps

  • Inventit Inc.

  • IPSwitch

  • Kerio Technologies, Inc.

  • Kyocera

  • Jolla Ltd.

  • Mail Districom

  • MailEnable Pty Ltd.

  • Mailtech Information Technology

  • MobileIron

  • NEC-CASIO Mobile Communications

  • NEC Corporation

  • NHN Corporation

  • NitroDesk Inc.

  • Nokia Corporation

  • Notify Technology Corporation

  • Orange S.A.

  • Pantech

  • Quantum Apps LLC

  • Rackspace USA Inc.

  • Remoba, Inc.

  • Samsung Electronics Co., Ltd.

  • Sony Corporation

  • SmarterTools Inc.

  • Sony Ericsson Mobile Communications AB

  • Spring House Entertainment

  • Taskbox Inc.

  • Thursby Software Systems

  • TT Network Integration (Thailand)

  • Unison Technologies Inc.

  • Voice on the Go. Inc.

  • Xandros, Inc.

  • XCome Technology Co., Ltd.

  • Yulong Computer

  • Zimbra

  • Zoho Corporation

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