Mail enabled public folder can't receive mail

Hi

We recently replaced one of our elderly domain controllers, a 2003 R2 to a Server 2012, as a start in the process of upgrading all our domain controllers to Server 2012.
We currently have 3 domain controllers with following OS.
Server 2003 R2
Server 2008 R2 (PDC)
Server 2012

Removing the 2003 and joining the 2012 by standard procedure, and it went without a hiccup.

The following night we rebooted all the domain controllers, and we discovered that public folders could no longer receive mail.

We got the following error while attempting to send mail to a mail enabled public folder:

#554 5.2.0 STOREDRV.Deliver.Exception:ObjectNotFoundException; Failed to process message due to a permanent exception with message The Active Directory user wasn't found. ObjectNotFoundException: The Active Directory user wasn't found. ##

As a solution we rebooted the new 2012 DC and it began working again, a temporary solution.

Able to recreate the issue by rebooting the domain controllers, it happens every second time after a reboot.

Regards.
LenblockAsked:
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Simon Butler (Sembee)Connect With a Mentor ConsultantCommented:
@ Dhanukadam - don't copy and paste from MSKB - include a link instead.
http://support.microsoft.com/kb/2487271

I don't even think the KB article is relevant, because this isn't a replication of public folder content issue.

@ Lenblock - what servers hold the global catalog role? Those are the servers that Exchange will want to use and if you reboot the GC Exchange doesn't go looking for anotehr GC for about 30 minutes.

Simon.
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LenblockAuthor Commented:
Hi

All three of our domain controllers holds the GC.

Both posts pointed to the same solution.
The weird thing though is that the problem only arose after we implemented the new 2012 DC, which we thought to be sinner in the first place.
Renamed the old administrative group, to old_groupname, and have not had any troubles since.

Thnx!

Redgards.
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