A Windows Management Instrumentation (WMI) instance provider returns an empty collection of an instance because of a network issue or a quota violation. In this situation, Microsoft Office Communications Server 2007 R2 Outbound Routing and Office Communications Server 2007 R2 translation update their configurations randomly.
To resolve this problem, install the following cumulative update:
2404547 Description of cumulative update for Office Communications Server 2007 R2: November, 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.