Hi All, Quick post to let everyone know that I had problems deploying RU5 on my newly built Exchange 2010 SP2 RU4 environment. I installed Exchange 2010 SP2 RU5 this morning and whenever I go to the properties of my DAG, right click DAG name, I get the following error Microsoft Corporation Microsoft Windows Operating System 6.1.7600.16385 Unexpected error [0x7944E5B3] while executing command 'Get-DatabaseAvailabilityGroup -Identity 'DAG01' -Status'. Microsoft.Exchange.Configuration.MonadDataProvider.CommandExecutionException: Unexpected error [0x7944E5B3] while executing command 'Get-DatabaseAvailabilityGroup -Identity 'DAG01' -Status'. ---> System.TypeLoadException: Could not load type 'Microsoft.Exchange.Rpc.ActiveManager.AmDeferredRecoveryEntry' from assembly 'Microsoft.Exchange.Rpc, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. at Microsoft.Exchange.Cluster.Replay.DagTaskHelper.GetServersInDeferredRecovery(DatabaseAvailabilityGroup dag) at Microsoft.Exchange.Management.SystemConfigurationTasks.GetDatabaseAvailabilityGroup.WriteResult(IConfigurable dataObject) at Microsoft.Exchange.Configuration.Tasks.GetTaskBase`1.WriteResult[T](IEnumerable`1 dataObjects) at Microsoft.Exchange.Configuration.Tasks.GetObjectWithIdentityTaskBase`2.InternalProcessRecord() at Microsoft.Exchange.Configuration.Tasks.Task.ProcessRecord() at System.Management.Automation.CommandProcessor.ProcessRecord() --- End of inner exception stack trace --- at Microsoft.Exchange.Configuration.MonadDataProvider.MonadPipelineProxy.ClosePipeline(MonadAsyncResult asyncResult) at Microsoft.Exchange.Configuration.MonadDataProvider.MonadPipelineProxy.InternalEndInvoke(IAsyncResult results) at Microsoft.PowerShell.HostingTools.PipelineProxyBase.EndInvoke(IAsyncResult results) at Microsoft.Exchange.Configuration.MonadDataProvider.MonadCommand.EndExecute(MonadAsyncResult asyncResult) at Microsoft.Exchange.Configuration.MonadDataProvider.MonadCommand.Execute(Object[] pipelineInput) at Microsoft.Exchange.Management.SystemManager.WinForms.MonadReadTask.Run(Object interactionHandler, DataRow row, DataObjectStore store) at Microsoft.Exchange.Management.SystemManager.WinForms.MonadCommandExecutionContext.Execute(TaskProfileBase profile, DataRow row, DataObjectStore store) at Microsoft.Exchange.Management.SystemManager.WinForms.AutomatedDataHandler.OnReadData(CommandInteractionHandler interactionHandler, String pageName) at Microsoft.Exchange.Management.SystemManager.WinForms.DataHandler.Read(CommandInteractionHandler interactionHandler, String pageName) at Microsoft.Exchange.Management.SystemManager.WinForms.DataContext.ReadData(CommandInteractionHandler interactionHandler, String pageName) at Microsoft.Exchange.Management.SystemManager.WinForms.ExchangePage.<OnSetActive>b__0(Object sender, DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument) mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Microsoft.ManagementConsole, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 MMCFxCommon, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a Microsoft.Exchange.Management.SnapIn.Esm, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Management.SystemManager, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.ManagementGUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.Common, Version=14.2.214.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Microsoft.Exchange.ManagementGUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Configuration.ObjectModel, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Microsoft.Exchange.Diagnostics, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a Microsoft.Exchange.Data.Directory, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.PowerShell.HostingTools, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System.Management.Automation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Net, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.resources, Version=14.0.0.0, Culture=en, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.ManagementGUI.resources, Version=14.0.0.0, Culture=en, PublicKeyToken=31bf3856ad364e35 System.Drawing.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a Microsoft.Exchange.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 PresentationFramework, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 WindowsBase, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 PresentationCore, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Core.Strings, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Core.Strings.resources, Version=14.0.0.0, Culture=en, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Extensibility.Internal, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System.Runtime.Serialization, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 pspluginwkr, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 System.Management, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a Microsoft.Exchange.HelpProvider, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Common.IL, Version=0.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Configuration.RedirectionModule, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Configuration.ObjectModel.resources, Version=14.0.0.0, Culture=en, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.Directory.resources, Version=14.0.0.0, Culture=en, PublicKeyToken=31bf3856ad364e35 System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Microsoft.Exchange.Compliance, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.Mapi, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Management, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Isam.Interop, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 BPA.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 BPA.UserInterface, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Interop.ActiveDS, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Interop.adsiis, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Interop.Migbase, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.DKM.Proxy, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.AirSync, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Approval.Applications, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.CabUtility, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Cluster.Replay, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.ApplicationLogic, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.Providers, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.Storage, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.EdgeSync.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.EdgeSync.DatacenterProviders, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.InfoWorker.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Live.DomainServices, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.MailboxReplicationService.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.MessageSecurity, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.MessagingPolicies.Rules, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Rpc, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Search.Native, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Security, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.StoreProvider, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Transport.Agent.AntiSpam.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Transport.Agent.SenderId.Core, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Transport, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Transport.Logging.Search, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Transport.Sync.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Transport.Sync.Worker, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.UM.TroubleshootingTool.Shared, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.UM.UMCommon, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.RightsManagementServices.Core, Version=6.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Search.ExSearch, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 MSExchangeLESearchWorker, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Data.Transport, Version=14.2.214.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Microsoft.Exchange.Sqm, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 Anonymously Hosted DynamicMethods Assembly, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null msvcm90, Version=9.0.30729.4959, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a Microsoft.Exchange.Management.resources, Version=14.0.0.0, Culture=en, PublicKeyToken=31bf3856ad364e35 Accessibility, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a I was able to run the Get-DatabaseAvailabilityGroup without issue. Only when doing it from the GUI did it error. I've uninstalled RU5 and error goes away. I re-installed RU5 and error came back. Since removed it as I don't have the time to troubleshoot this atm. Servers are running the latest Windows updates.

I can confirm this problem after installation Ru5, right now to fix this we have to uninstall RU5 Remigiusz ExchangeBlog

SP2 RU5 V2 released: http://support.microsoft.com/?kbid=2785908