Exchange 2010, RU9

Error on changing recipient properties of the mailboxes.
entire site.

Anyone seen this before?

  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(WorkUnit[] workUnits)
   at Microsoft.Exchange.Management.SystemManager.WinForms.SingleTaskDataHandler.OnSaveData()
   at Microsoft.Exchange.Management.SystemManager.WinForms.SingleTaskDataHandler.OnSaveData(CommandInteractionHandler interactionHandler)
   at Microsoft.Exchange.Management.SystemManager.WinForms.DataHandler.Save(CommandInteractionHandler interactionHandler)
   at Microsoft.Exchange.Management.SystemManager.WinForms.MonadSaveTask.Run(Object interactionHandler, DataRow row, DataObjectStore store)
   at Microsoft.Exchange.Management.SystemManager.WinForms.SaverTaskProfile.Run(CommandInteractionHandler 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.OnSaveData(CommandInteractionHandler interactionHandler)
   at Microsoft.Exchange.Management.SystemManager.WinForms.DataHandler.Save(CommandInteractionHandler interactionHandler)
   at Microsoft.Exchange.Management.SystemManager.WinForms.DataContext.SaveData(CommandInteractionHandler interactionHandler)
   at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)

An error occurred executing the configuration section handler for appSettings.
   at System.Configuration.RuntimeConfigurationRecord.GetRuntimeObject(Object result)
   at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object& result, Object& resultRuntimeObject)
   at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
   at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
   at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
   at System.Configuration.BaseConfigurationRecord.GetSection(String configKey)
   at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
   at System.Configuration.ConfigurationManager.GetSection(String sectionName)
   at System.Configuration.ConfigurationManager.get_AppSettings()
   at Microsoft.Exchange.Net.AppSettingsEntry`1.InitializeIfNeeded()
   at Microsoft.Exchange.Net.AppSettingsEntry`1.get_Value()
   at Microsoft.Exchange.Data.Directory.SystemConfiguration.CacheTimeToLive.get_OrgPropertyCacheTimeToLive()
   at Microsoft.Exchange.Data.Directory.SystemConfiguration.OrganizationPropertyCache.TryGetOrganizationProperties(OrganizationId organizationId, OrganizationProperties& organizationProperties)
   at Microsoft.Exchange.Data.Directory.CapabilityHelper.GetIsLicensingEnforcedInOrg(OrganizationId organizationId)
   at Microsoft.Exchange.Data.Storage.ExchangePrincipal..ctor(ADUser user, ADObjectId mdb, DatabaseLocationInfo databaseLocationInfo, RemotingOptions remotingOptions, Boolean asArchive)
   at Microsoft.Exchange.Data.Storage.ExchangePrincipal.InternalFromADUser(ADUser user, RemotingOptions remotingOptions)
   at Microsoft.Exchange.Management.SystemConfigurationTasks.AdminAuditLogHelper.CheckArbitrationMailboxStatus(OrganizationId organizationId, ADUser& user, ExchangePrincipal& principal, String& errorMessage)
   at Microsoft.Exchange.ProvisioningAgent.AdminLogAgentClassFactory.ConfigWrapper.get_ArbitrationMailboxStatus()
   at Microsoft.Exchange.ProvisioningAgent.AdminLogAgentClassFactory.ConfigWrapper.get_LoggingEnabled()
   at Microsoft.Exchange.ProvisioningAgent.AdminLogProvisioningHandler.Validate(IConfigurable readOnlyIConfigurable)
   at Microsoft.Exchange.Provisioning.ProvisioningLayer.Validate(Task task, IConfigurable readOnlyIConfigurable)
   at Microsoft.Exchange.Configuration.Tasks.SetTaskBase`1.InternalProvisioningValidation()
   at Microsoft.Exchange.Configuration.Tasks.Task.ProcessRecord()
   at System.Management.Automation.CommandProcessor.ProcessRecord()

Invalid syntax.
   at System.Security.SecurityDocument.InternalGetElement(Int32& position, Boolean bCreate)
   at System.Security.SecurityDocument.GetChildrenPositionForElement(Int32 position)
   at System.Security.Policy.PolicyStatement.FromXml(SecurityDocument doc, Int32 position, PolicyLevel level, Boolean allowInternalOnly)
   at System.Security.Policy.PolicyLevel.CheckCache(Int32 count, Char[] serializedEvidence)
   at System.Security.Policy.PolicyLevel.Resolve(Evidence evidence, Int32 count, Char[] serializedEvidence)
   at System.Security.PolicyManager.CodeGroupResolve(Evidence evidence, Boolean systemPolicy)
   at System.Security.PolicyManager.ResolveHelper(Evidence evidence)
   at System.Security.PolicyManager.Resolve(Evidence evidence)
   at System.Configuration.ClientConfigurationHost.GetRestrictedPermissions(IInternalConfigRecord configRecord, PermissionSet& permissionSet, Boolean& isHostReady)
   at System.Configuration.BaseConfigurationRecord.GetRestrictedPermissions()
   at System.Configuration.RuntimeConfigurationRecord.GetRuntimeObjectWithRestrictedPermissions(ConfigurationSection section)
   at System.Configuration.RuntimeConfigurationRecord.GetRuntimeObject(Object result)