Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2

Topic Last Modified: 2012-07-23

You can enable Microsoft ActiveSync. By default, ActiveSync is enabled when you install the Client Access server role on the computer that's running Microsoft Exchange Server 2010.

Looking for other management tasks related to Exchange ActiveSync? Check out Managing Exchange ActiveSync.


  • The Internet Information Services (IIS) component ASP.NET is installed.

  • The ASP.NET Web service extension status is Allowed, not Prohibited. You can verify the status of the ASP.NET Web service extension in IIS Manager by expanding the server name and then clicking Web Service Extensions. If the ASP.NET Web service extension isn't set to Allowed, right-click the Web service extension to change the status.

Use IIS Manager to enable Exchange ActiveSync

To perform the following procedures, you must have Local Administrator privileges on the Client Access server.

  1. Click Start, click Administrative Tools, and then click Internet Information Services (IIS) Manager.

  2. Double-click to expand the server name, and then double-click to expand the Application Pools folder.

  3. Right-click MSExchangeSyncAppPool, and then click Start to enable ActiveSync.

    If the Start command isn't available, ActiveSync is already enabled on this server.