Over the past couple of years we have migrated a number of our sub domains & separate domains, into a single global domain. We also migrated sites from using their own separate Exchange 2003 mail servers, to using a single global Exchange 2007 infrastructure. During this migration 1000s of users were migrated from the old Exchange 2003 servers, over to the new Exchange 2007 mailbox servers. 99.9% migrated without issue. However the odd one or two have had an issue.
We have a user who has an email account on our new domain, AND on one of the old decommissioned domains. This user shows up twice in the GAL and it has caused multiple issues
We have tried deleting the account from the original domain but she still shows up in the GAL.
Currently the old user's AD account doesn't appear to exist anywhere, it's been deleted from the old domain, I've gone through ADSI Edit searching for the unique DN, and can't find anything, but the account still shows up in the GAL.
I have tried forcing a GAL update using "Get-OfflineAddressBook | Update-OfflineAddressBook" & "Get-ClientAccessServer | Update-FileDistributionService"
Is there anyway to delete the GAL entry with some PowerShell command or something? Or some way I can find where this ghost account exists?