Calendar items disappear from BlackBerry smartphones after applying SP1 to Microsoft Exchange Server 2010

Article ID: KB23949

Type: Support Content

Last Modified: 08-29-2012


Product(s) Affected:

  • BlackBerry Enterprise Server for Microsoft Exchange
  • BlackBerry® Enterprise Server 5.0 SP2 for Microsoft® Exchange
  • Microsoft® Exchange Server 2010 SP1
  • DT 775901
  • DT 788164

Calendar items disappear from BlackBerry® smartphones after Service Pack 1 is applied to Microsoft® Exchange Server 2010.

This can be determined using the following log lines:

Example from the BlackBerry Cal helper (CALH) log:

[40000] (07/29 11:45:07.213):{0x73C} {} Service::GetCalendarItemSourceKeysAndGoids found 0 in calendar
[40000] (07/29 11:45:07.447):{0x73C}
{} Service::GetCalSyncItemsToDelete found 512 to process
[40000] (07/29 11:45:07.463):{0x73C}
{} Service::GetInactiveCalSyncItems will delete 159 items
[40000] (07/29 11:45:07.838):{0x73C}
{} Service::GetInactiveCalSyncItems found 333 inactive items

Corresponding BlackBerry Mailbox Agent (MAGT) log:

[40740] (07/29 11:45:07.181):{0x854}
{} Starting calendar deleted rescan
[40000] (07/29 11:45:07.181):{0x854}
{} UserControl::FindAndQueueAllCalendarDeletes - Getting inactive cal sync items
[40000] (07/29 11:45:07.838):{0x854}
{} UserControl::FindAndQueueAllCalendarDeletes - Found 333 items
[40741] (07/29 11:45:07.869):{0x854}
{} Calendar deleted rescan completed


In Microsoft Exchange Server 2010 SP1 the Default Client Throttling Policy values have changed resulting in the maximum EWSFindCountLimit being set to 1000.


Create a new BlackBerry Enterprise Server policy using the Microsoft Exchange Management Shell using the following steps:

  1. On a computer that hosts the Microsoft Exchange Management Shell, open the Microsoft Exchange Management Shell.
  2. Type New-ThrottlingPolicy BESPolicy .
  3. Type Set-ThrottlingPolicy BESPolicy -RCAMaxConcurrency $NULL -RCAPercentTimeInCAS $NULL -RCAPercentTimeInMailboxRPC $NULL -RCAPercentTimeInAD $NULL –EWSMaxConcurrency $NULL –EWSPercentTimeInAD $NULL –EWSPercentTimeinCAS $NULL – EWSPercentTimeInMailboxRPC $NULL –EWSMaxSubscriptions $NULL –EWSFastSearchTimeoutInSeconds $NULL –EWSFindCountLimit $NULL
  4. Type Set-Mailbox "BESAdmin" -ThrottlingPolicy BESPolicy .
  5. Restart the BlackBerry Controller Service.

Note: Restarting BlackBerry Enterprise Server services will delay email message delivery to BlackBerry smartphones. For more information, see KB04789

To confirm EWSMaxConcurrency has been disabled, follow these steps:
  1. On a computer that hosts the Microsoft Exchange Management Shell, open the Microsoft Exchange Management Shell.
  2. Type Get-ThrottlingPolicy BESPolicy .
  3. Confirm the value for EWSMaxConcurrency is null (blank).


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