BlackBerry Mail Store Service known issues
It can take longer than expected to receive email messages on a BlackBerry® 9300 smartphone. (DT 1121063)
In a Microsoft® Exchange 2010 environment, if the BlackBerry Mail Store Service does not communicate with the client access server each hour, the connection times out and the BlackBerry Mail Store Service cannot connect using MAPI anymore. (DT 1099358)
Workaround: Restart the BlackBerry Mail Store Service.
If you install BlackBerry® Enterprise Server 5.0 SP2 or later in an environment with Microsoft® Exchange Server 2010, and if the BlackBerry Mail Store Service loses the MAPI connection to the Client Access Server, when the HrFindExchangeGlobalAddressList call fails the BlackBerry Mail Store Service continues to try to use the MAPI session that ended. (DT 990681)
Workaround: Restart the BlackBerry Mail Store Service.
If the Microsoft Exchange Server 2010 SP1 does not include the public folder database, the BlackBerry Mail Store Service cannot connect to it and you cannot add users to the BlackBerry Enterprise Server. For more information, visit www.blackberry.com/btsc to read article KB24470. (DT 854245)