Looking for some advice on ways forward to resolve an issue with the setup of an Exchange 2013 server (Server 2012 R2 cas & mailbox) into a test environment that has 2 exchange 2010 servers running on server 2008 r2.  Servers are hosted on WMware and 2010 exchange are configured as hybrid servers

Downloaded Exchange 2013 CU12.  Install went fine with no errors.  I can access Exchange Admin Centre and view 2010 servers . I can add new mailboxes on the default mailbox which is created with Exchange 2013.  The issue starts when I start to open a session of Exchange management shell I get the below error. Connections fails with error 504

Has anyone seen this error before and know a fix - have found this article but there's no fix https://social.technet.microsoft.com/Forums/exchange/en-US/60873037-b04d-41fc-ae66-261e2db4af12/the-winrm-client-received-an-http-status-504-from-the-remote-wsmanagement?forum=exchange2010

What's the advice on moving forward with this issue?

thanks in advance 

VERBOSE: Connecting to EX13MB1.xmail.mmu.ac.uk.

New-PSSession : [ex13mb1.xmail.mmu.ac.uk] Connecting to remote server ex13mb1.xmail.mmu.ac.uk failed with the

following error message : The WinRM client received an HTTP status code of 504 from the remote WS-Management service.

For more information, see the about_Remote_Troubleshooting Help topic.

At line:1 char:1

+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin

   gTransportException

    + FullyQualifiedErrorId : -2144108273,PSSessionOpenFailed

VERBOSE: Connecting to EX13MB1.xmail.mmu.ac.uk.

New-PSSession : [ex13mb1.xmail.mmu.ac.uk] Connecting to remote server ex13mb1.xmail.mmu.ac.uk failed with the

following error message : The WinRM client received an HTTP status code of 504 from the remote WS-Management service.

For more information, see the about_Remote_Troubleshooting Help topic.

At line:1 char:1

+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin

   gTransportException

    + FullyQualifiedErrorId : -2144108273,PSSessionOpenFailed

VERBOSE: Connecting to XMBS1.xmail.mmu.ac.uk.

New-PSSession : [xmbs1.xmail.mmu.ac.uk] Connecting to remote server xmbs1.xmail.mmu.ac.uk failed with the following

error message : The WinRM client received an HTTP status code of 504 from the remote WS-Management service. For more

information, see the about_Remote_Troubleshooting Help topic.

At line:1 char:1

+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin

   gTransportException

    + FullyQualifiedErrorId : -2144108273,PSSessionOpenFailed

VERBOSE: Connecting to CAHT1.xmail.mmu.ac.uk.

New-PSSession : [caht1.xmail.mmu.ac.uk] Connecting to remote server caht1.xmail.mmu.ac.uk failed with the following

error message : The WinRM client received an HTTP status code of 504 from the remote WS-Management service. For more

information, see the about_Remote_Troubleshooting Help topic.

At line:1 char:1

+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...

Hello TechNet's users and mods,

Currently I'm busy setting up a SolidCP test environment with Hosted Organizations and Hosted Exchange.

----------------------------------------------------------------------------------------------------------

Specs are:

- 1x Active Directory - Windows Server 2012 R2 Standard - all updates installed (40GB HDD - 4GB RAM);

- 2x Exchange in DAG (DAG1) - Windows Server 2012 R2 Standard - Exchange Server 2012 Enterprise SP1 - all updates installed (40GB HDD - 8GB RAM);

- Machines are virtual (ESXi).

SolidCP Portal, Enterprise Server and Server are all installed on the AD machine, including SQL Express 2012 SP1 as DB.

2x SolidCP Servers are installed on the Exchange machines communicating with the AD machine SolidCP components.

----------------------------------------------------------------------------------------------------------

Everthing's been going pretty smooth, that was until I wanted to create a Mailbox for a reseller's customer in SolidCP Portal on the AD machine.

Now the error I get is:

System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Exception: Error executing 'CREATE_MAILBOX' task on 'test' EXCHANGE ---> System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> Connecting to remote server ex2.websitepaneltest.bas failed with the following error message : The WinRM client cannot process the request. It cannot determine the content type of the HTTP response from the destination computer. The content type is absent or invalid. For more information, see the about_Remote_Troubleshooting Help topic.   at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)   at SolidCP.Providers.Exchange.ExchangeServer.CreateMailEnableUser(String upn, String organizationId, String organizationDistinguishedName, String securityGroup, String organizationDomain, ExchangeAccountType accountType, String mailboxDatabase, String offlineAddressBook, String addressBookPolicy, String accountName, Boolean enablePOP, Boolean enableIMAP, Boolean enableOWA, Boolean enableMAPI, Boolean enableActiveSync, Int64 issueWarningKB, Int64 prohibitSendKB, Int64 prohibitSendReceiveKB, Int32 keepDeletedItemsDays, Int32 maxRecipients, Int32 maxSendMessageSizeKB, Int32 maxReceiveMessageSizeKB, Boolean hideFromAddressBook, Boolean isConsumer, Boolean enabledLitigationHold, Int64 recoverabelItemsSpace, Int64 recoverabelItemsWarning)   at SolidCP.EnterpriseServer.ExchangeServerController.CreateMailbox(Int32 itemId, Int32 accountId, ExchangeAccountType accountType, String accountName, String displayName, String name, String domain, String password, Boolean sendSetupInstructions, String setupInstructionMailAddress, Int32 mailboxPlanId, Int32 archivedPlanId, String subscriberNumber, Boolean EnableArchiving)   --- End of inner exception stack trace ---   at SolidCP.EnterpriseServer.ExchangeServerController.CreateMailbox(Int32 itemId, Int32 accountId, ExchangeAccountType accountType, String accountName, String displayName, String name, String domain, String password, Boolean sendSetupInstructions, String setupInstructionMailAddress, Int32 mailboxPlanId, Int32 archivedPlanId, String subscriberNumber, Boolean EnableArchiving)   at SolidCP.EnterpriseServer.esExchangeServer.CreateMailbox(Int32 itemId, Int32 accountId, ExchangeAccountType accountType, String accountName, String displayName, String name, String domain, String password, Boolean sendSetupInstructions, String setupInstructionMailAddress, Int32 mailboxPlanId, Int32 archivedPlanId, String subscriberNumber, Boolean EnableArchiving)   --- End of inner exception stack trace ---

I hope someone is able to help me with this matter. If I missed to write down some info in this thread, please tell.

With all thanks,

Bas

Hi all,

I'm trying to figure out how best to move forward with the above project. Currently, our business has Exchange 2007 in a 2003 forest and an existing Lync 2013 Resource forest at 2012, using FIM to create the user stubs. This works very well, however we'd like to deploy Exchange 2013 or 2016 into the Lync forest and move mailboxes over to the new implementation, as there is too much risk to raise the user forest level. 

I have been doing some research and whilst I can find many guides and articles about how to deploy into a brand new forest, I'm coming up short with answers for my scenario. To my mind it should be achievable, but I'm a little hazy on the specifics of how we'd get the user mail across. Wouldn't we need to have both accounts active to migrate mailboxes, then reconnect each mailbox as linked accounts? 

Has anyone had any experience of doing this sort of migration in the past, and if so, how did you resolve it?

Hope you can help!

Hi All,

We are finally moving away from 2007 exchange to 2013. Exchange 2013 server is set up and working fine. I migrate couple of mailboxes already and it was successful. For the night I set to move a batch of 40 and in the morning find out that half of them was successful and all the rest got error:

Data migrated: 1.305 GB ‎(1,401,485,331 bytes)‎ 
Migration rate: 0 B ‎(0 bytes)‎ 
Error: UserAlreadyBeingMigratedException: The user ‎'name@domain.co.uk‎' already has a
 pending request. Please remove the existing request and resume the current batch or start a 
new batch for this user. --> Mailbox ‎'name‎' is already being moved to ‎'DB03‎'. 

it should be an easy fix as DB03 run out of space on the hard drive. I added more space and just hit "resume" button expecting it will continue migrating but it failed with the same error.

I have try to run:

Remove-MoveRequest -Identity <user mailbox identity>
IISreset

also

Get-MoveRequest -MoveStatus Completed | Remove-MoveRequest
IISreset

but it was the same issue.

So I delete failing batch and recreate only one failed mailboxe and run it. Error message this time was different:

Data migrated:  
Migration rate:  
Error: MigrationTransientException: Cannot open mailbox /o=DOMAIN /ou=Exchange Administrative
 Group ‎(FYDIOHF23SPDLT)‎/cn=Configuration/cn=Servers/cn=MAILSRV/cn=Microsoft System Attendant.
 --> Cannot open mailbox /o=DOMAIN/ou=Exchange Administrative Group
 ‎(FYDIOHF23SPDLT)‎/cn=Configuration/cn=Servers/cn=MAILSRV/cn=Microsoft System Attendant.
 --> MapiExceptionMailboxQuarantined: Unable to open message store. ‎(hr=0x80004005, ec=2611)‎
 Diagnostic context: Lid: 55847 EMSMDBPOOL.EcPoolSessionDoRpc called [length=132] Lid: 43559
 EMSMDBPOOL.EcPoolSessionDoRpc returned [ec=0x0][length=232][latency=15] Lid: 52176 ClientVersion:
 15.0.1178.4 Lid: 50032 ServerVersion: 15.0.1178.6004 Lid: 23226 --- ROP Parse Start --- 
Lid: 27962 ROP: ropLogon [254] Lid: 17082 ROP Error: 0xA33 Lid: 26937 Lid: 21921 
StoreEc: 0xA33 Lid: 27962 ROP: ropExtendedError [250] Lid: 1494 ---- Remote Context Beg
 ---- Lid: 50608 Lid: 32848 dwParam: 0x14 Lid: 61416 StoreEc: 0xA33 Lid: 56872 dwParam:
 0xFE Lid: 42712 StoreEc: 0xA33 Lid: 10786 dwParam: 0x0 Msg: 15.00.1178.000:MAILSRV Lid:
 1750 ---- Remote Context End ---- Lid: 26849 Lid: 21817 ROP Failure: 0xA33 Lid: 26297 Lid:
 16585 StoreEc: 0xA33 Lid: 32441 Lid: 1706 StoreEc: 0xA33 Lid: 24761 Lid: 20665 StoreEc: 0xA33 
Lid: 25785 Lid: 29881 StoreEc: 0xA33  

So last thing I try was to remove GUID from regedit QuarantineMailboxes and reset IIS with result that mailbox status is "Syncing" for an hour now and not going any where further (moving data, items, also time is going only for "totalquidduration")

I hope some else was having this issue and will be able to help me.

Thanks

Zee

I am migrating from Exchange 2010 to 2013 in an environment where Outlook Anywhere was previously never configured.  I flipped my host record on my computer to point to the new 2013 environment and found I could not connect to my mailbox (which is still on 2010).  

I remembered that I did not enable Outlook Anywhere in the 2010 environment and went ahead and did so.  I am now getting settings from the autodiscover, but it is not checking the box that says on fast connections and the box on slow connections and therefore is not using Outlook Anywhere to connect to the mailbox.  

Is there a setting that will force RPC over HTTPS to be the default connection instead of the RPC connection it is making?  Is this a setting in the autodiscover / Exchange setup or must this be done via GPO?

NNatic

Hi,

We have 2013 up and running coexistence with 2010, Name space cutover and mail flow cutover has been configured. All users have been moved to 2013, Now we are in the phase for decommission 2010.

We have some accepted domains in exchange 2010, Do we need to configured those accepted domains into 2013 before decommissioning 2010.

When installing Exchange 2013 CU12 in an Exchange 2007 multi tenant environment i get he following error when the mailbox role is installed. Tenant segregation was done by modifying permissions to the address books using adsiedit. I have reverted these settings and run he setup again for Exchange 2013 but still get this error. When looking in the All Global Address Lists container using adsi edit, I see 2 extra objects cn=Default Global Address List2 and cn=Default Global Address List3 that I can't delete. This is referenced in the error below. Any help would be appreciated.

Error:
The following error was generated when "$error.Clear();
          if (!$RoleIsDatacenter -and !$RoleIsDatacenterDedicated)
          {
            $createNewOab = $false;
            $oabName = $null;
            $oabAddressList = $null;
            $oabVdirs = $null;
            $oabGlobalWebDistribution = $false;
            $oabConfiguredAttributes = $null;

            Write-ExchangeSetupLog -Info ("Looking for an existing default OAB");
            $defaultOab = Get-OfflineAddressBook -DomainController:$RoleDomainController | where {$_.IsDefault};
            if ($defaultOab -ne $null)
            {
              Write-ExchangeSetupLog -Info ("Found a default OAB: " + $defaultOab.Name + "; checking its version");
              if ($defaultOab.ExchangeVersion.CompareTo([Microsoft.Exchange.Data.ExchangeObjectVersion]::Exchange2012) -lt 0)
              {
                $e15Oab = Get-OfflineAddressBook -DomainController:$RoleDomainController | where {$_.ExchangeVersion.CompareTo([Microsoft.Exchange.Data.ExchangeObjectVersion]::Exchange2012) -eq 0};
                if ($e15Oab -eq $null)
                {
                  Write-ExchangeSetupLog -Info ("Existing OAB is Exchange 2010 or older; will create a new OAB");
                  $createNewOab = $true;
                  $oabName = $defaultOab.Name + " (Ex2013)";
                  $oabAddressList = $defaultOab.AddressLists;
                  $oabGlobalWebDistribution = $defaultOab.GlobalWebDistributionEnabled;
                  $oabConfiguredAttributes = $defaultOab.ConfiguredAttributes;
                }
                else
                {
                  Write-ExchangeSetupLog -Info ("Already has an existing Exchange 2013 OAB:" + $e15Oab.Name + "; will not create a new OAB");
                }
              }
              else
              {
                Write-ExchangeSetupLog -Info ("Existing OAB is Exchange 2013 or newer; will not create a new OAB");
              }
            }
            else
            {
              Write-ExchangeSetupLog -Info ("Did not find a default OAB; will create one");
              $createNewOab = $true;
             
              $oabName = [Microsoft.Exchange.Data.Directory.SystemConfiguration.OfflineAddressBook]::DefaultName;
              $nonDefaultOabWithDefaultName = Get-OfflineAddressBook $oabName -DomainController:$RoleDomainController -ErrorAction SilentlyContinue | where {$_.IsDefault -eq $false};
              if ($nonDefaultOabWithDefaultName -ne $null)
              {
                $createNewOab = $false;
                Write-ExchangeSetupLog -Warning `
                  ("Offline address book " + `
                  $nonDefaultOabWithDefaultName.Name + `
                  " already exists: " + `
                  $nonDefaultOabWithDefaultName.DistinguishedName + `
                  ". Use administrative tools to change it to default OAB.");
              }

              $allGals = @(Get-GlobalAddressList -DomainController:$RoleDomainController | where {$_.IsDefaultGlobalAddressList});
              if ($allGals -eq $null -or $allGals.Count -eq 0)
              {
                $createNewOab = $false;
                Write-ExchangeSetupLog -Warning `
                  ("Couldn't find the default global address list. The default offline address book can't be created.");
              }
              elseif ($allGals.Count -gt 1)
              {
                $createNewOab = $false;
                Write-ExchangeSetupLog -Warning `
                  ("Found " + $allGals.Count + " default global address lists. You can have only one default global address list in your organization. The default offline address book will not be created.");
              }
              else
              {
                $oabAddressList = $allGals[0];
                Write-ExchangeSetupLog -Info ("OAB will be based on default GAL: " + $oabAddressList.Name);
              }
            }

            if ($createNewOab)
            {
              if ($oabGlobalWebDistribution -eq $false)
              {
                $currentAdSiteDn = (Get-ExchangeServer $RoleFqdnOrName -DomainController:$RoleDomainController).Site.DistinguishedName;
                $allOabVdirs = @(Get-OabVirtualDirectory -ADPropertiesOnly -DomainController:$RoleDomainController);
                $e15MinimumServerVersion = New-Object Microsoft.Exchange.Data.ServerVersion([Microsoft.Exchange.Data.Directory.SystemConfiguration.Server]::E15MinVersion);
                if ($allOabVdirs -ne $null -and $allOabVdirs.Count -gt 0)
                {
                  foreach ($oabVdir in $allOabVdirs)
                  {
                    if ([Microsoft.Exchange.Data.ServerVersion]::Compare($oabVdir.AdminDisplayVersion, $e15MinimumServerVersion) -gt 0)
                    {
                      $oabVdirSiteDn = (Get-ExchangeServer $oabVdir.Server -DomainController:$RoleDomainController).Site.DistinguishedName;
                      if ($oabVdirSiteDn -eq $currentAdSiteDn)
                      {
                        $oabVdirs = $oabVdir;
                        break;
                      }
                      elseif ($oabVdirs -eq $null)
                      {
                        $oabVdirs = $oabVdir;
                      }
                    }
                  }
                }

                if ($oabVdirs -ne $null)
                {
                  Write-ExchangeSetupLog -Info ("OAB will be distributed to OAB virtual directory " + $oabVdirs.Name);
                }
                else
                {
                  Write-ExchangeSetupLog -Info ("Could not find any OAB virtual directories; OAB will be configured without distribution.");
                }
              }

              try
              {
                Write-ExchangeSetupLog -Info ("Creating new default OAB.");
                $newOab = New-OfflineAddressBook `
                  -Name $oabName `
                  -AddressLists $oabAddressList `
                  -VirtualDirectories $oabVdirs `
                  -GlobalWebDistributionEnabled $oabGlobalWebDistribution `
                  -IsDefault $true `
                  -DomainController:$RoleDomainController;
              }
              catch [Microsoft.Exchange.Data.Directory.ADObjectAlreadyExistsException]
              {
                Write-ExchangeSetupLog -Warning ("Tried to create new default OAB but the object already exists; it may have been created by another instance of setup.");
              }

              if ($oabConfiguredAttributes -ne $null)
              {
                Write-ExchangeSetupLog -Info ("Setting OAB ConfiguredAttributes to: " + $oabConfiguredAttributes);
                Set-OfflineAddressBook $newOab -ConfiguredAttributes $oabConfiguredAttributes -DomainController:$RoleDomainController;
              }
            }
          }
        " was run: "Microsoft.Exchange.Configuration.Tasks.ManagementObjectNotFoundException: Address list or global address list "\Default Global Address List2" was not found. Please make sure you typed the identity correctly.
   at Microsoft.Exchange.Configuration.Tasks.DataAccessTask`1.GetDataObject[TObject](IIdentityParameter id, IConfigDataProvider session, ObjectId rootID, OptionalIdentityData optionalData, Nullable`1 notFoundError, Nullable`1 multipleFoundError, ExchangeErrorCategory errorCategory)
   at Microsoft.Exchange.Configuration.Tasks.DataAccessTask`1.GetDataObject[TObject](IIdentityParameter id, IConfigDataProvider session, ObjectId rootID, Nullable`1 notFoundError, Nullable`1 multipleFoundError)
   at Microsoft.Exchange.Management.SystemConfigurationTasks.OfflineAddressBookTaskUtility.ValidateAddressBook(IConfigDataProvider session, AddressBookBaseIdParameter[] addressBooks, GetUniqueObject getAddressBook, OfflineAddressBook target, TaskErrorLoggingDelegate writeError)
   at Microsoft.Exchange.Management.SystemConfigurationTasks.NewOfflineAddressBookInternal.PrepareDataObject()
   at Microsoft.Exchange.Configuration.Tasks.SetTaskBase`1.InternalValidate()
   at Microsoft.Exchange.Configuration.Tasks.NewMultitenancySystemConfigurationObjectTask`1.InternalValidate()
   at Microsoft.Exchange.Management.SystemConfigurationTasks.NewOfflineAddressBookInternal.InternalValidate()
   at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__b()
   at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)".

Dear All,

I've  Exchange 2013 on Windows 2012 server  and external internet users have been reporting that attachments they receive from internal users are showing only as winmail.dat .

When I use this command "Set-RemoteDomain -Identity * -TNEFEnabled $false" , it solved my issue with the winmail.dat sending with attachments and PDF files etc delivered.

However, once this was enabled we were having delivery failure notifications and having large number of emails (going to external users) that would get stuck in the submission queue.  I had to enter following command "Set-RemoteDomain -Identity * -TNEFEnabled $true" to solve the problem and winmail.dat issue came back and attachments were not delivered.

When users report attachment winmail.dat issue, I have to create new remote domain and specify -TNEFEnabled $false everytime like below for the failed domains (They are usually non Microsoft clients, I think).

New-RemoteDomain -Name xxxx -DomainName xxxx.com

Set-RemoteDomain -Identity xxxx -TNEFEnabled $False

Setting client`s Outlook mail format to Plain Text or HTML doesn`t help.

I don`t mind create every time but users have to experience this issue and then I can add remote domain and solve the issue but it is creating inconvenience. Do you have any permanent solution for this problem?

Kind regards,

Itech

Hi,

How can I configure High Availability on Client Access Server of Exchange 2013 ? 

for load balancing, do I need to have a load balancer layer (VM or HW) in place?

Regards,

Tarek

In previous versions of Exchange was able to run a simple command to delete emails older than specified date.

export-mailbox -identity USERID@newsmax.com -startdate 01/01/2009 -enddate 05/30/2009 -deletecontent

However, in the Exchange 2013 system we have upgraded to there does not appear to be an export-mailbox cmdlet.

I also can not find the search-mailbox cmdlet which was the alternative method to try to do this.

Is there an option to delete items this way?

Hi

My update failed on step 16/17.  Not sure if I should run the setup again or not? The error i got was: DependentAssemblyGenerator.Exe has stopped working.

Hi,

I'm setting up exchange 2013 within a exchange 2010 environment, its all going ok but Ive hit a bit of a problem. The only way I can get the outlook 2010 clients to connect is to manually configure them using outlook anywhere and manually adding the server settings - this is with a migrated account. Ive checked the auto discovery which appears to be working I setup the external connection name to mirror that of the exchange 2010 box and also the internal (which didn't effect anything) so I'm at a bit of a lose end - could anyone suggest anything please?

Thanks 

Hello Everyone

We are migrating our public folder from 2010 to 2013 to the new modern public folders.   Our public folders have been historically used for archiving project correspondence which I know is not best practices but we are where are and they need to be migrated.  From what I have read MS seems to have now embraced public folders with the new public folder mailboxes.

We have 6 top level folders which have subfolders by client.  In the client level folders there are project folders which are the only folders that contain actual email.   None of the project folders is over 6 GB.   The total amount of public folder data is 1.2 TB.   I do realize we need to be looking at other solutions but right now I need to get these over to EX 2013.

We have run the scripts to export our hierarchy and which has exported about 8000 folders.  Many of those are parent folders show zero data.   When we run the  PublicFolderToMailboxMapGeneratorscript but it does seem to call out every folder.  Can someone explain what this file should look like?  To me it seems like it is missing data.  Thanks

We are planning to update our Exchange 2013 environment .

Is it possible to rollback a cumulative update for Exchange 2013?

For example: Rollback from Exchange Server 2013 CU12 to CU6

Is there a Microsoft best practices for this?

Signature?

Hello

Can anyone explain me what is a smart host? Can it be a anti spam firewall or message archiever?

Small organization. 

Production server is exchange 2010 (on server 2008 R2)

I need to migrate it to exchange 2013 (on server 2012 R2).

It fails when I try to upgrade exchange 2010 to sp3. It actually ends up breaking the server and I have to restore it from before the sp3 update (which pretty much eliminates a true migration)

I'm getting the feeling that I need to setup the 2013 from scratch. 

My question is this: Can I install exchange 2013 in the same domain without it breaking our production server?

I would like to create mailboxes and duplicate mail flow without interrupting the 2010 server and then once I have everything in place I can just change the mx on the inside and outside. 

I'm getting the feeling like the 2013 server would take over and break the production.

Any input/ideas/alternative options kindly accepted as well.

Hello all,

I am installing Exchange server cu12 in my lab.. At that time of installation, Readiness check getting this error .. Previously I used the same server name and ip address for installing exchange 2013 in same domain.. I have a doubt any entries about previously installed exchange server is still in AD and now its not allowing to install cu12.. Please help me

Screenshot: https://social.technet.microsoft.com/Forums/getfile/839668

Error:

Pre-request analysis - 100%

The Mailbox server role is already installed on this computer For more information :https://technet.microsoft.com/library(EXCHG.150)/ms.exch.setupreadiness.ClientAccessRoleAlreadyExists.aspx

The Client access role is already installed on this computer For more information :https://technet.microsoft.com/library(EXCHG.150)/ms.exch.setupreadiness.ClientAccessRoleAlreadyExists.aspx

Bottom it showing back and retry

I am planning to migrate from Exchange 2007 with roll-up 4 to Exchange 2013. In Exchange 2007 mailbox installed with SCC deployed with single HUB/CAS.

My query is that can I install and coexistence of Exchange 2013 with Exchange 2007 with roll-up 4 or need to upgrade roll-up before installing Exchange 2013.

Please guide.