Users can’t access their mailboxes from anywhere as they get the error in the screenshot.

Related errors are 3002, 3005

Event code: 3005

Event message: An unhandled exception has occurred.

Event time: 7/29/2015 11:10:57 AM

Event time (UTC): 7/29/2015 8:10:57 AM

Event ID: 6f94ea40e3964fb1a05d9fc48ffb4299

Event sequence: 38

Event occurrence: 2

Event detail code: 0

Application information:

Application domain: /LM/W3SVC/1/ROOT/owa-2-130826309519814020

Trust level: Full

Application Virtual Path: /owa

Application Path: C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\

Machine name: EX2K1301

Process information:

Process ID: 19348

Process name: w3wp.exe

Account name: NT AUTHORITY\SYSTEM

Exception information:

Exception type: NullReferenceException

Exception message: Object reference not set to an instance of an object.

at Microsoft.Exchange.Clients.Common.UserAgent.HasString(String str)

at Microsoft.Exchange.Clients.Common.UserAgent.get_Layout()

at Microsoft.Exchange.Clients.Common.UserAgent.get_LayoutString()

at ASP.auth_logon_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer)

at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)

at System.Web.UI.Page.Render(HtmlTextWriter writer)

at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Request information:

Request URL: https://mail.Domain.com:443/owa/auth/logon.aspx?url=https://mail.Domain.com/owa/PowerShell-LiveID&reason=0

Request path: /owa/auth/logon.aspx

User host address: 10.16.0.172

User:

Is authenticated: False

Authentication Type:

Thread account name: NT AUTHORITY\SYSTEM

Thread information:

Thread ID: 67

Thread account name: NT AUTHORITY\SYSTEM

Is impersonating: False

Stack trace: at Microsoft.Exchange.Clients.Common.UserAgent.HasString(String str)

at Microsoft.Exchange.Clients.Common.UserAgent.get_Layout()

at Microsoft.Exchange.Clients.Common.UserAgent.get_LayoutString()

at ASP.auth_logon_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer)

at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)

at System.Web.UI.Page.Render(HtmlTextWriter writer)

at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Custom event details:

OWA PAGE

Solution:

On Exchange servers, Make sure that Exchange servers are not members of Organization Management group and if they are then remove them and run this cmdlet anyway on all Exchange Servers then restart the Servers.

Get-ClientAccessServer | Add-ADPermission -AccessRights ExtendedRight -ExtendedRights “ms-Exch-EPI-Token-Serialization”, “ms-Exch-EPI-Impersonation” -User (Exchange Server name)

Make sure you restart Exchange servers after you apply these cmdlet

Symptoms

After you attempt to try Hybrid Configuration Wizard between Exchange 2013 SP1 and Exchange online (Office 365), You are unable to login to your OWA/ECP Page and instead you get an 500 unexpected error:

If you go to event viewer You might find Event ID 4 which shows the error:

Cause:

The HCW or “Hybrid Configuration Wizard” In Exchange 2013 (CU6 or 8) might cause some changes to your CAS folder in the following path and file.

“c:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\ecp\DDI”` the file name is RemoteDomains.xaml and multiply some variables which causes ECP to fail and report that error.

Error:

Current user: 'Domain.local/User'



Request for URL 'https://ex2k1301.Domain.local:444/ecp/default.aspx(https://mail.Domain.com/ecp/)' failed with the following error:



System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Data.DuplicateNameException: A column named 'TargetDeliveryDomain' already belongs to this DataTable.



at System.Data.DataColumnCollection.RegisterColumnName(String name, DataColumn column)



at System.Data.DataColumnCollection.BaseAdd(DataColumn column)



at System.Data.DataColumnCollection.AddAt(Int32 index, DataColumn column)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase.CreateColumn(DataTable table, Dictionary`2 rbacMetaData)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(Service profileBuilder)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(String schemaFilesInstallPath, String schema)



at Microsoft.Exchange.Management.DDIService.WSListDataHandler..ctor(String schemaFilesInstallPath, String resourceName, String workflowName, DDIParameters parameters, SortOptions sortOptions)



at Microsoft.Exchange.Management.DDIService.DDIServiceHelper.GetListCommon(DDIParameters filter, SortOptions sort, Boolean forGetProgress)



--- End of inner exception stack trace ---



at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)



at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)



at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)



at Microsoft.Exchange.Management.ControlPanel.WebServiceReference.GetList(DDIParameters filter, SortOptions sort)



at Microsoft.Exchange.Management.ControlPanel.OrganizationCache.LoadTargetDeliveryDomain(AddValueHandler addValue, LogErrorHandler logError)



at Microsoft.Exchange.Management.ControlPanel.OrganizationCache.TryGetValue[T](String key, T& value)



at Microsoft.Exchange.Management.ControlPanel._Default.RenderMetroTopNav()



at ASP.default_aspx.__RendermainForm(HtmlTextWriter __w, Control parameterContainer)



at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)



at System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer)



at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer)



at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)



at ASP.default_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer)



at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)



at System.Web.UI.Page.Render(HtmlTextWriter writer)



at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)



at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)



at System.Web.UI.Page.HandleError(Exception e)



at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)



at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)



at System.Web.UI.Page.ProcessRequest()



at System.Web.UI.Page.ProcessRequest(HttpContext context)



at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()



at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)



at System.Web.UI.Page.HandleError(Exception e)



at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)



at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)



at System.Web.UI.Page.ProcessRequest()



at System.Web.UI.Page.ProcessRequest(HttpContext context)



at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()



at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)



System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Data.DuplicateNameException: A column named 'TargetDeliveryDomain' already belongs to this DataTable.



at System.Data.DataColumnCollection.RegisterColumnName(String name, DataColumn column)



at System.Data.DataColumnCollection.BaseAdd(DataColumn column)



at System.Data.DataColumnCollection.AddAt(Int32 index, DataColumn column)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase.CreateColumn(DataTable table, Dictionary`2 rbacMetaData)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(Service profileBuilder)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(String schemaFilesInstallPath, String schema)



at Microsoft.Exchange.Management.DDIService.WSListDataHandler..ctor(String schemaFilesInstallPath, String resourceName, String workflowName, DDIParameters parameters, SortOptions sortOptions)



at Microsoft.Exchange.Management.DDIService.DDIServiceHelper.GetListCommon(DDIParameters filter, SortOptions sort, Boolean forGetProgress)



--- End of inner exception stack trace ---



at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)



at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)



at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)



at Microsoft.Exchange.Management.ControlPanel.WebServiceReference.GetList(DDIParameters filter, SortOptions sort)



at Microsoft.Exchange.Management.ControlPanel.OrganizationCache.LoadTargetDeliveryDomain(AddValueHandler addValue, LogErrorHandler logError)



at Microsoft.Exchange.Management.ControlPanel.OrganizationCache.TryGetValue[T](String key, T& value)



at Microsoft.Exchange.Management.ControlPanel._Default.RenderMetroTopNav()



at ASP.default_aspx.__RendermainForm(HtmlTextWriter __w, Control parameterContainer)



at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)



at System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer)



at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer)



at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)



at ASP.default_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer)



at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)



at System.Web.UI.Page.Render(HtmlTextWriter writer)



at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)



at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)



at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)



at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)



at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)



at Microsoft.Exchange.Management.ControlPanel.WebServiceReference.GetList(DDIParameters filter, SortOptions sort)



at Microsoft.Exchange.Management.ControlPanel.OrganizationCache.LoadTargetDeliveryDomain(AddValueHandler addValue, LogErrorHandler logError)



at Microsoft.Exchange.Management.ControlPanel.OrganizationCache.TryGetValue[T](String key, T& value)



at Microsoft.Exchange.Management.ControlPanel._Default.RenderMetroTopNav()



at ASP.default_aspx.__RendermainForm(HtmlTextWriter __w, Control parameterContainer)



at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)



at System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer)



at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer)



at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)



at ASP.default_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer)



at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)



at System.Web.UI.Page.Render(HtmlTextWriter writer)



at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)



at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)



System.Data.DuplicateNameException: A column named 'TargetDeliveryDomain' already belongs to this DataTable.



at System.Data.DataColumnCollection.RegisterColumnName(String name, DataColumn column)



at System.Data.DataColumnCollection.BaseAdd(DataColumn column)



at System.Data.DataColumnCollection.AddAt(Int32 index, DataColumn column)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase.CreateColumn(DataTable table, Dictionary`2 rbacMetaData)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(Service profileBuilder)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(String schemaFilesInstallPath, String schema)



at Microsoft.Exchange.Management.DDIService.WSListDataHandler..ctor(String schemaFilesInstallPath, String resourceName, String workflowName, DDIParameters parameters, SortOptions sortOptions)



at Microsoft.Exchange.Management.DDIService.DDIServiceHelper.GetListCommon(DDIParameters filter, SortOptions sort, Boolean forGetProgress)



at System.Data.DataColumnCollection.RegisterColumnName(String name, DataColumn column)



at System.Data.DataColumnCollection.BaseAdd(DataColumn column)



at System.Data.DataColumnCollection.AddAt(Int32 index, DataColumn column)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase.CreateColumn(DataTable table, Dictionary`2 rbacMetaData)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(Service profileBuilder)



at Microsoft.Exchange.Management.DDIService.AutomatedDataHandlerBase..ctor(String schemaFilesInstallPath, String schema)



at Microsoft.Exchange.Management.DDIService.WSListDataHandler..ctor(String schemaFilesInstallPath, String resourceName, String workflowName, DDIParameters parameters, SortOptions sortOptions)



at Microsoft.Exchange.Management.DDIService.DDIServiceHelper.GetListCommon(DDIParameters filter, SortOptions sort, Boolean forGetProgress)



Flight info: Features:[[Global.DistributedKeyManagement, False],[Global.GlobalCriminalCompliance, False],[Global.MultiTenancy, False],[Global.WindowsLiveID, False],[Eac.AllowMailboxArchiveOnlyMigration, True],[Eac.AllowRemoteOnboardingMovesOnly, False],[Eac.BulkPermissionAddRemove, True],[Eac.CmdletLogging, True],[Eac.CrossPremiseMigration, False],[Eac.DevicePolicyMgmtUI, False],[Eac.DiscoveryDocIdHint, False],[Eac.DiscoveryPFSearch, False],[Eac.DiscoverySearchStats, False],[Eac.DlpFingerprint, False],[Eac.EACClientAccessRulesEnabled, False],[Eac.GeminiShell, False],[Eac.ManageMailboxAuditing, False],[Eac.ModernGroups, False],[Eac.Office365DIcon, False],[Eac.OrgIdADSeverSettings, False],[Eac.RemoteDomain, False],[Eac.UCCAuditReports, False],[Eac.UCCPermissions, False],[Eac.UnifiedAuditPolicy, False],[Eac.UnifiedComplianceCenter, False],[Eac.UnifiedPolicy, False],[Eac.UnlistedServices, False],], Flights:[], Constraints:[[LOC, EN-US],[MACHINE, EX2K1301],[MODE, ENTERPRISE],[PROCESS, W3WP],[USER, Username(EditeD)@],[USERTYPE, BUSINESS],], IsGlobalSnapshot: False

Solution:

Looking in the path I have wrote above “\Microsoft\Exchange Server\V15\ClientAccess\ecp\DDI” and opening the file that I have mentioned “RemoteDomains.xaml” you can clearly see there are incorrect format that have been duplicated 3 times.

To make sure that this was the cause, I have another server with CU8 on it so I went and checked the same file which was in the same location to find the result different.

This is the server that works in another environment and doesn’t have any issue.

So, the solution was to remove the two duplicates and correct the format of the variable line… I corrected the first line that includes

<Variable DataObjectName=”RemoteDomain” Name=”TargetDeliveryDomain” Type=”{x:Type s:Boolean}” />

And deleted the other two identical lines.. then I saved the file and closed notepad.

Next: Open IIS on the same server and go to “Application Pools” right click on the affected pools and Recycle them.. You don’t need to reset IIS as the fix should work right away.

Recycle ECP Pool

After recycling checking if the pool is reporting started or not…

Next I open ECP and it works without an issue

You cannot have ArchiveDomain set when archive is not enabled for this user.

I have previously done a Hybrid integration with Office 365 with my Exchange 2010 server and enabled Archiving online when I migrated my user to Exchange online but then I finished my demo and decided to bring the user back on-premises.

Now I have deployed Exchange 2013 and wanted to migrate the same user to Exchange 2013 from 2010 but the migration request fails with the following message.

On Exchange 2010, I launched Exchange Management shell and ran the following cmdlet which will show any attribute that has arch in it for the user Mohammed

Get-mailbox User | fl arch*

Since there’s no archive mailbox then the archive domain is invalid and I don’t even own it anymore as it has expired a while ago.

Resolution:

I will try to remove the archive domain object from the user’s properties using the following cmdlet

Set-mailbox mailboxname -ArchiveDomain $null

Using the above cmdlet seems to fail due to this property being administered by Exchange server so it’ll have to be removed manually.

I will open the user’s attribute and delete the value and try to continue the migration again.

I’ll click on Edit then Clear and OK

Migration finished successfully

Performance counters for the Client access role is not installed

To solve the problem

• Open the Exchange Management Shell
• Run the following cmd: add-pssnapin Microsoft.Exchange.Management.PowerShell.Setup
• Run the following cmd: new-perfcounters –definitionfilename “C:\Program Files\Microsoft\Exchange Server\V14\Setup\Perf\RpcClientAccessPerformanceCounters.xml”

By running these cmds we will install the Performance Counters needed for the RPC Client Access Service. Once installed the error won’t be displayed anymore.

In a very interesting situation that I came through I had an environment with two DCs and Exchange 2010 that I had previously setup for Hybrid integration with Office 365 for demonstration with a trial subscription but I haven’t removed the integration after I finished my test and the trial expired and the tenant was deleted.

Next I intended to upgrade my existing Exchange 2010 to Exchange 2013 and setup coexistence between them however, I have stumbled in the step of preparation of AD schema for Exchange 2013. While trying to prepare the schema I got the following error

Setup /PrepareSchema /IAcceptExchangeServerLicenseTerms

Welcome to Microsoft Exchange Server 2013 Cumulative Update 8 Unattended Setup

Copying Files…

File copy complete. Setup will now collect additional information needed for

installation.

Performing Microsoft Exchange Server Prerequisite Check

Prerequisite Analysis FAILED

A hybrid deployment with Office 365 has been detected. Please ensure that you are running setup with the /TenantOrganizationConfig switch. To use the TenantOrganizationConfig switch you must first connect to your Exchange Online tenant via PowerShell and execute the following command: “Get-OrganizationConfig | Export-Clixml -Path MyTenantOrganizationConfig.XML”. Once the XML file has been generated, run setup with the TenantOrganizationConfig switch as follows “/TenantOrganizationConfig MyTenantOrganizationConfig.XML”.

If you continue to see this this message then it indicates that either the XML file specified is corrupt, or you are attempting to upgrade your on-premises Exchange installation to a build that isn’t compatible with the Exchange version of your Office 365 tenant. Your Office 365 tenant must be upgraded to a compatible version of Exchange before upgrading your on-premises Exchange installation. For

more information, see: http://go.microsoft.com/fwlink/?LinkId=262888

For more information, visit: http://technet.microsoft.com/library(EXCHG.150

)/ms.exch.setupreadiness.DidTenantSettingCreatedAnException.aspx The Exchange Server setup operation didn’t complete. More details can be found in ExchangeSetup.log located in the <SystemDrive>:\ExchangeSetupLogs folder.

The Office 365 Hybrid setup was still there in my Exchange Console and since I couldn’t follow MS’s recommended steps to connect to O365 tenant and get the XML file then I had to do things manually.

First I connected to the EMC and removed all the instances that were created during the Exchange Hybrid Wizard Configuration

1- Removing Organization Relationships

2- Removing Federation Trust

3- Removing Remote Domains

4- Removing Accepted Domains

5- Removing Send and Receive Connectors

6- Lastly the Hybrid Configuration object…

Since remove-hybridconfiguration cmdlet is not supported to remove the hybrid configuration object from AD then we have no choice but to use ADSIEDIT tool to do so.

I will navigate to Configuration > Services > Microsoft Exchange > First Organization > Delete “CN=Hybrid Configuration”

Restart MSExchangeServicehost

Now I will try again to prepare AD schema for Exchange 2013 but I got a different error

Extending Active Directory schema FAILED

The following error was generated when “$error.Clear);

install-ExchangeSchema -LdapFileName ($roleInstallPath + “Setup\Data\”+$

RoleSchemaPrefix + “schema0.ldf”)” was run: “Microsoft.Exchange.Configuration.Tasks.TaskException: There was an error while running ‘ldifde.exe’ to import the schema file ‘C:\Windows\Temp\ExchangeSetup\Setup\Data\PostExchange2003_schema0.ldf’. The error code is: 8224. More details can be found in the error file: ‘C:\Users\Administrator.DEMOTESAS\AppData\Local\Temp\2\ldif.err’at Microsoft.Exchange.Configuration.Tasks.Task.ThrowError(Exception exception, ErrorCategory errorCategory, Object target, String helpUrl)at Microsoft.Exchange.Management.Deployment.InstallExchangeSchema.ImportSchem

aFile(String schemaMasterServer, String schemaFilePath, String macroName, StringmacroValue, WriteVerboseDelegate writeVerbose)at Microsoft.Exchange.Management.Deployment.InstallExchangeSchema.InternalPro

cessRecord()at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__b()at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)”.The Exchange Server setup operation didn’t complete. More details can be found

in ExchangeSetup.log located in the <SystemDrive>:\ExchangeSetupLogs folder.

Checking the ldif.err file mentioned in the error above it seems that Exchange is complaining because the changes of the AD schema is not being replicated to the other AD partners which is true since I have another additional DC that’s turned off.

After turning on the other DC we’ll see what happens

The other DC had another issue as I have turned it off for long time and it was not syncing due to expired Tomb stone life so I had to fix this issue as well and I have published it in a different article.

Please click here to see how the replication issue was fixed.

Issue has been fixed

Hope someone finds this useful

After DC migration and changing in the PDC and Schema master role server to the new DC and shut down the old DC for test. On Exchange 2010 server you might get the following error

An error caused a change in the current set of Active Directory settings. Restart The Exchange Management Console.

Exchange Console

Current deployment

1. Exchange 2010
2. New DC 2012 R2 with another Additional DC installed newly.
3. Two DC 2008R2 but have been shut down for testing.

Problem:

After you shutdown or demote the old PDC or Schema master Demote Domain Controller role, Microsoft Exchange Management Console fails to retrieve any Exchange information with error message “An error caused a change in the current set of Active Directory Server settings. Restart Exchange Management console.”

Cause

Microsoft Exchange management console caches the data in the user’s profile for quick access, So whenever you try to open EMC from an existing Exchange admin profile you will get the same error.

Resolution:

Navigate to the following folder and delete the Exchange Management Console file.

%userprofile%\appdata\roaming\Microsoft\MMC\Exchange Management Console

Close EMC and reopen it and you should be done.

Symptoms

In an environment where one DC exist after adding Windows 2012 R2 Servers as additional servers, Exchange 2007 doesn’t show the new servers although they also hold GC.

Research:

To locate the problem you should search the event ID (2080) which shows the populated DCs and the permissions allowed on Exchange servers

In the below screenshot, the SACL right was not provided to the new DCs due to GPO problem.

After checking sites, Replication, all is healthy and no issue with it.

3 servers (Two 2012 servers) and one DC 2003 Server

Exchange 2010 SP3 servers.

Reason:

The Default Domain Controllers Policy was not linked to the Domain Controllers OU.

Resolution:

After Linking the Domain Controllers OU to the Default Controllers policy, the SACL permission was provided without any issue.

Now Exchange is reporting healthy and can read the new DCs which allow us to demote the old DCs

After removing the old DC