We upgraded late last year from Exchange 2007 to 2010. Mostly things seemed to go as expected but somewhere we got off-track in the post-upgrade clean-up type things.
We are fairly vanilla environment: had one 2007 Mailbox/HT Server and a separate CAS server. Now all roles on one 2010 server.
Is it a problem that the old "First Administrative Group" is still present in AD somehow?
So a few symptoms:
Getting replication errors. We migrated Public Folders to new hotness during the appropriate time in the upgrade. Still get 4030 errors stating things like
Process Microsoft.Exchange.InfoWorker.Common.Delayed`1[System.String]: Unable to find any replicas for free/busy folder EX:/o=NetBIOS_domain/ou=First Administrative Group.
We followed the steps to decommission the old 2007 as per MS and various articles on the interwebs. Very carefully. The old servers were uninstalled and turned off. (Still in rack ;-)
We have two GALs curiously enough. One called "Default Global Address List" and one called "MyCo Global Address List". One appears to be legacy maybe 'cuz the First Admin Group is still around?
When running this: Update-GlobalAddressList -Identity "Default Global Address List" -DomainController "MyDC"
I get this: WARNING: The recipient "FQDN/Microsoft Exchange System Objects/Offline Address Book - First Administrative Group" is invalid and couldn't be updated.
If I run this same command using the other GAL name (MyCo Global Address List) it appears to work.
New users (ones created since upgrade) appear in the All Users (address list) distribution group and in the GAL but not in the OAB. Is it prudent to clean up the ADSI before deleting and recreating another OAB? Seems to me we did this once before in Dec13 which not coincidently is the modified date of the OAB files.
So...I have seen Microsoft's recommendation is NOT to rip out the old "First Administrative Group" or edit things in ASDI all willy nilly but something is not quite right. Any guidance?