Outgoing PSTN calls are unavailable and Event ID 46020 is logged on an Office Communications Server 2007 R2 front-end server

SYMPTOMS
Outgoing Public Switched Telephone Network (PSTN) calls are unavailable in an Microsoft Office Communications Server 2007 R2 environment. Additionally, you find the following Event is logged on the Office Communications Server 2007 R2 front-end server:

Event Type: Error
Event Source: OCS Outbound Routing
Event Category: (1038)
Event ID: 46020
Description:
An unexpected exception occurred while loading configuration data and outbound calls may be affected.
Exception:
Stack: at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)at System.Management.ManagementObjectCollection.ManagementObjectEnumerator.MoveNext()at Microsoft.Rtc.OutboundRouting.Settings.LoadWmiClass(String className, CallBack callback)at Microsoft.Rtc.OutboundRouting.Settings.LoadPhoneUsages()at Microsoft.Rtc.OutboundRouting.Settings.Load()
Cause:
This could be caused due to failure to contact the DC. Review other WMI event log entries for details.
Resolution:
If this persists, restart the front end service.

CAUSE
This issue occurs because of an error that is encountered when Office Communications Server 2007 R2 loads the Outbound Routing policies.
RESOLUTION
To fix this problem, install the following cumulative update:
983472 Description of cumulative update for Office Communications Server 2007 R2: July, 2010
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
For more information about the latest updates for Communications Server 2007 R2, click the following article number to view the article in the Microsoft Knowledge Base:

968802 Updates for Communications Server 2007 R2

Properties

Article ID: 2254197 - Last Review: 07/22/2010 16:28:00 - Revision: 1.0

Microsoft Office Communications Server 2007 R2 Enterprise Edition, Microsoft Office Communications Server 2007 R2 Standard Edition

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