You can perform the following tasks on an Microsoft ActiveSync server.

• Enable and disable ActiveSync - By default, ActiveSync is enabled when the Client Access Server role is installed in an organization. You can disable ActiveSync for a user or a group of users by using the Exchange Management Console or the Exchange Management Shell. If you must disable ActiveSync across your organization, you can configure the ActiveSync virtual directory to refuse all connections by stopping the Web services on that virtual directory.
  
• Manage access to Microsoft Windows SharePoint Services sites and Microsoft Windows file shares - ActiveSync lets users access documents and links stored on Windows SharePoint Services sites and Windows file shares. You can configure specific sites to be allowed or blocked. Sites that are allowed can be accessed by any user who has Windows SharePoint Services or Windows file share access. Blocked sites cannot be accessed under any circumstances. You can also configure the default behavior for sites that are not specified in the Allowed List or Block List.
  
• View ActiveSync protocol logs - ActiveSync contains several reports that you can use to manage your ActiveSync server.
  
• Configure authentication for ActiveSync - By default, ActiveSync is configured to use Basic authentication and requires Secure Sockets Layer (SSL). You can configure other authentication methods including RSA SecurID.
  

More information and links are provided at Managing an Exchange ActiveSync Server.