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On a computer that is running Microsoft Exchange Server 2007, you open Exchange Management Shell. Then, you try to obtain the cluster mailbox server status of a remote cluster continuous replication (CCR) cluster by running the following cmdlet:
Get-ClusteredMailboxServerStatus -Identity cluster mailbox server name
When you do this, the Get-ClusteredMailboxServerStatus cmdlet does not run successfully. Additionally, you receive the following error message:
WARNING: An unexpected error has occurred and debug information is being generated: Object reference not set to an instance of an object. Get-ClusteredMailboxServerStatus : Object reference not set to an instance of an object. At line:1 char:33
Additionally, the following event is logged in the Application log:
Event Type: Error Event Source: MSExchange Common Event Category: General Event ID: 4999 Description: Watson report about to be sent to dw20.exe for process id: process id, with parameters: E12, processor, version, powershell, M.E.C.Replay, M.E.C.R.NetworkNameMatcher.IsNetNameResourceReachable, System.NullReferenceException, 7616, version. ErrorReportingEnabled: False
This behavior occurs if the CCR replication was enabled by using a redundant network name.
Note Typically, to enable CCR replication, the following cmdlet is used:
Enable-ContinuousReplicationHostName -Identity cluster mailbox server name -TargetMachine node name -IPv4Address ip address -HostName ContinuousReplicationHostName
Workaround 1 (preferred)
Run the Get-ClusteredMailboxServerStatus cmdlet locally on the cluster node that owns the clustered mailbox server whose status you want to view. You can also use the Remote Desktop client to connect to a node in the cluster and then run the Get-ClusteredMailboxServerStatus cmdlet locally in this manner.
Disable the ContinuousReplicationHostName cmdlet. To do this, run the following cmdlet:
Disable-ContinuousReplicationHostName -Identity cluster mailbox server name -TargetMachine node name -IPv4Address ip address -HostName ContinuousReplicationHostName
This behavior is by design.
For more information, visit the following Microsoft Web sites: