Exchange 2010- RoutingMasterDN set to deleted

We've recently upgraded our Exchange 2010 server to SP2. We now get the following error:

Process Microsoft.Exchange.RpcClientAccess.Service.exe (PID=2712). Object [CN=Exchange Routing Group (DWBGZMFD01QNBJR),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=****,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=*****,DC=***]. Property [RoutingMasterDN] is set to value [**************
DEL:29577807-c961-4393-8b3c-da94a9ac73b3], it is pointing to the Deleted Objects container in Active Directory. This property should be fixed as soon as possible.

Source: MSExchange ADAccess
EventID: 2937

This article deals with this issue but I am unable to follow the solution as I can't find the relevant entries in ADSIEdit:

http://www.expta.com/2010_09_01_archive.html
•Open ADSIEdit and navigate to CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=companyabc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=companyabc,DC=com.
 •Right-click the Edge Transport server and copy the distinguishedName value.
 •Navigate to CN=Exchange Routing Group (DWBGZMFD01QNBJR),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=companyabc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=companyabc,DC=com and open its properties
 •Paste the copied DN value to the msExchangeRoutingMasterDN attribute

Can anyone help?
mark-199Asked:
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jrhelgesonCommented:
You cannot find the entries in ADSIEDIT because the entries have been deleted in Active Directory.
You either need to use ldp.exe in order to restore the vaule (undelete it) or you can have the value recreated by re-running the exchange setup active directory prep.

This is done by running the setup.com file from the command prompt.  Instructions are as follows:

Launch command prompt
Change Directory to E:\ (exchange install CD)
  SETUP.com /PS [or /PrepareSchema]
  SETUP.com /P [or /PrepareAD]
  SETUP.com /PD [or /PrepareDomain]
 
That will re-create and repopulate the values used by Exchange in Active Directory.
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mark-199Author Commented:
Sorry for the delay in getting back to this question. I will only be able to deal with this again next week and will then post an update. Thanks
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mark-199Author Commented:
I have now fixed the Event Viewer error by running the following PS command: Get-Mailbox -Identity "DiscoverySearchMailbox{D919BA05-46A6-415f-80AD-7E09334BB852}" | Set-Mail
box -Database "MDB01". This produced the following output:

WARNING: The object tlmint.org/Users/DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852} has been corrupted,
and it's in an inconsistent state. The following validation errors happened:
WARNING: Database is mandatory on UserMailbox.
WARNING: Database is mandatory on UserMailbox.

Confirm
Rehoming mailbox "tlmint.org/Users/DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}" to database "MDB01".
This operation will only modify the mailbox's Active Directory configuration. Be aware that the current mailbox content
 will become inaccessible to the user.
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [?] Help (default is "Y"): Y
I then ran: "Get-Mailbox -Arbitration |ft -wrap" and the output was fine.

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mark-199Author Commented:
I may run the setup commands at a later stage but for now the error is fixed.
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