Environment

Exchange 2007- All mailboxes are hosted on Exchange 2007 servers.

Exchange 2000 - Only being used to relay emails, RUS is running on these servers.

Abnormality what i have noticed is that contact objects being created on exchange 2007 server are getting legacyexchangedn as "OU=itca" which is name of Exchange 2000 administrative group. Ideally, any objects created on Exchange 2007 should get legacyexchangedn like "OU=Exchange administrative group (FYDI....)" .

This happens only with contacts. Legacyexchangedn on mailbox is getting stamped correctly.

I am trying to understand why contact objects are getting incorrect legacyexchangedn. Any help on this would be appreciated. 

Hi,

Can you change the OU when create contacts?
Please try below link to create contact, for your reference:
https://technet.microsoft.com/en-us/library/aa997220(v=exchg.80).aspx

Meanwhile, we can modify the default OU by AD. More details about Redirecting the users and computers containers in Active Directory domains, please refer to:
http://support.microsoft.com/kb/324949/en-us

Best Regards,
Allen Wang