- You install Update Rollup 4 for Microsoft Exchange Server 2010 SP2 in an environment that is running against a Blackberry Enterprise Server (BES).
- The BES uses MAPI or Collaborative Data Objects (CDO), instead of Exchange Web Services (EWS), to communicate with Exchange servers.
- The mailbox contains many folders. For example, the mailbox contains more than 5000 folders.
- Email message delivery to the mailbox on a BlackBerry mobile device is delayed.
- It takes a longer time to complete a folder hierarchy scan in the mailbox. For example, before Update Rollup 4 for Exchange Server 2010 SP2 was installed, a scan that typically takes 5 minutes may now take 30 minutes to 1 hour.
- The Microsoft Exchange Information Store process (store.exe) on the Exchange Mailbox server may use excessive CPU resources.
- Some BES event log entries are logged on the Exchange Mailbox server. Before Update Rollup 4 for Exchange Server 2010 SP2 was installed, these entries are less in occurrence or nonexistent.
- Some events are logged in the BlackBerry Messaging Agent (MAGT) log. These events that are logged in the BlackBerry MAGT log resemble the "Busy Working" threads that are described in the following article in the BlackBerry Knowledge Base: Users may experience delayed email after upgrading to Microsoft Exchange 2010 SP2 Rollup 4 or Microsoft Exchange 2010 SP2 Rollup 5
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