After upgrading domain controllers from Windows 2008 R2 to windows 2012 R2. We cannot copy an existing user that has a mailbox.We get the error Windows cannot create the object username because: The name reference is invalid.
Therefore, I applied Update Rollup 17 for Exchange Server 2007 Service Pack 3.
I am still getting the same error.
In addition, I am getting errors like
Consolidate: The Active Directory service Referral interface failed to service a client request. RFRI is returning an error.
The Directory Service Referral interface failed to service a client request.
RFRI is returning the error code:[0x3f0].
Referral Interface cannot contact any global catalog server that supports the NSPI Service.
Referral Interface cannot contact any Global Catalog that supports the NSPI Service.
Clients making RFR requests will fail to connect until a Global Catalog becomes available again.
After a Domain Controller is promoted to a Global Catalog, it must be rebooted to support MAPI Clients.
I am not finding anything wrong on the Global Catalog servers.