Hi all,here's my environment:DC+HUB+CAS+Mailbox roles on Windows Server 2003 Enterprise Sp2 R2 x86, Exchange 2007 sp 1 w/o rollupsCluster node 1 Windows Server 2003 Enterprise Sp2 R2 x86 with public and cluster networksCluster node2 Windows Server 2003 Enterprise Sp2 R2 x86 with public and cluster networksCluster created with majority node set and File share witness, cluster move process occurs w/o any errors. When i try to install CCR and Active Clustered mailbox, i get an error that "object reference not set to an instance of an object"ExchangeSetuplog.txt file contains above lines[28.06.2009 00:38:32] [2] Dumping the cluster named: .[28.06.2009 00:38:32] [2] Groups[28.06.2009 00:38:32] [2] group: Cluster Group [Cluster Quorum/Main Group, PreferredOwners = ][28.06.2009 00:38:32] [2] OwnerNode: CCRPASSIVE[28.06.2009 00:38:32] [2] State: Online[28.06.2009 00:38:32] [2] Resource: Cluster IP Address [Online, type = IPv4Address, PossibleOwners = ccractive,ccrpassive ][28.06.2009 00:38:32] [2] Address = [10.10.0.199][28.06.2009 00:38:32] [2] EnableDhcp = [0][28.06.2009 00:38:32] [2] Network = [Public][28.06.2009 00:38:32] [2] Resource: Cluster Name [Online, type = NetName, PossibleOwners = ccractive,ccrpassive ][28.06.2009 00:38:32] [2] NetName = [SEVI][28.06.2009 00:38:32] [2] Resource: Majority Node Set [Online, type = MajorityNodeSet, PossibleOwners = ccractive,ccrpassive ][28.06.2009 00:38:32] [2] Nodes[28.06.2009 00:38:32] [2] node: CCRACTIVE [ state = Up ][28.06.2009 00:38:32] [2] node: CCRPASSIVE [ state = Up ][28.06.2009 00:38:32] [2] CheckNewCmsParametersAndFillInDefaults() -- verifying the parameters are valid.[28.06.2009 00:38:32] [2] Verifying that the cluster does not contain a single copy cluster and a clustered mailbox server using cluster continuous replication.[28.06.2009 00:38:32] [2] CountServersAndCheckCmsOwner(): group 'Cluster Group' has a network name of 'SEVI'.[28.06.2009 00:38:32] [2] CountServersAndCheckCmsOwner() found 0 servers.[28.06.2009 00:38:32] [2] NewClusteredMailboxServerObjects InternalValidate left.[28.06.2009 00:38:32] [2] NewClusteredMailboxServerObjects.InternalProcessRecord(): Name='Nur', IPAddress='10.10.0.79', SharedStorage='False', DisasterRecovery='False', DataPath='C:\CCR'.[28.06.2009 00:38:35] [2] [WARNING] An unexpected error has occurred and debug information is being generated: Object reference not set to an instance of an object.[28.06.2009 00:38:35] [2] [ERROR] Object reference not set to an instance of an object.[28.06.2009 00:38:36] [1] Exception : System.Management.Automation.CmdletInvocationException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Exchange.Cluster.Replay.ResourceHelper.ExchangeNodesIncludingCurrent(Cluster cluster, Node[] exchangeNodes) at Microsoft.Exchange.Cluster.Replay.ResourceHelper.SetPossibleOwnerForIPResource(Resource ipRes, Node[] exchangeNodes, Boolean ignoreCurrentOwner) at Microsoft.Exchange.Cluster.Replay.ResourceHelper.ConfigureIPv4StaticResources(Group group, IPAddress[] ipv4Addresses) at Microsoft.Exchange.Management.SystemConfigurationTasks.NewClusteredMailboxServerObjects.ConfigureIPResources() at Microsoft.Exchange.Management.SystemConfigurationTasks.NewClusteredMailboxServerObjects.FindOrCreateNetworkResources() at Microsoft.Exchange.Management.SystemConfigurationTasks.NewClusteredMailboxServerObjects.InternalProcessRecord() at Microsoft.Exchange.Configuration.Tasks.Task.ProcessRecord() at System.Management.Automation.Cmdlet.DoProcessRecord() at System.Management.Automation.CommandProcessor.ProcessRecord() --- End of inner exception stack trace --- at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object input, Hashtable errorResults, Boolean enumerate) at System.Management.Automation.Parser.PipelineNode.Execute(Array input, Pipe outputPipe, ArrayList& resultList) at System.Management.Automation.Parser.StatementListNode.Execute(Array input, Pipe outputPipe, ArrayList& resultList)[28.06.2009 00:38:36] [1] [WARNING] An unexpected error has occurred and debug information is being generated: Object reference not set to an instance of an object.[28.06.2009 00:38:36] [1] [ERROR] Object reference not set to an instance of an object.[28.06.2009 00:38:36] [1] [ERROR] Object reference not set to an instance of an object.[28.06.2009 00:40:14] [0] [WARNING] Setup has made changes to operating system settings that require a reboot to take effect. Please reboot this server prior to placing it into production.[28.06.2009 00:40:15] [0] End of SetupAll computers running on Virtual PC test environmet. I need your help.

Check info: 1. Is there any error event in the application log on the active node? 2. Have the Microsoft .NET Framework 2.0 SP2 or the .NET Framework 3.5 SP1 been installed on the nodes? 3. Hows the network connectivity among the servers? Please ping the NetBIOS name, FQDN and IP addresses among the servers 4. Please run Repadmin /showrepl and Dcdiag /v on both domains to check the AD replication 5. Please also use NetDiag to check the network in the domain 6. Please refer my troubleshooting steps in this thread on the issue

Hi James,Here's the answers.1- Yes, Event ID 4999, Source MS Exchange Common.2- No, just .Net FW 2.0SP1 is installed.3- All tests are successful.4- Single domain controller. Event viewer shows no error.5- Netdiag shows no error.Thank you.

Could you provide the description of the event 4999? The two steps in my link above can also be used on windows 2003