Hi Karl,  When you create a new CIFS server (DEPT-PROD1) - you need an IP address for this CIFS server irrespective of whether you join it to the domain or not. Each CIFS server requires at least one unique IP Address on the network.  Having said that, if you unjoin PROD1 from Orange AD - the CIFS server is no more available to the users for access, but the CIFS server in still there on the Celerra and uses the IP Address what it had. That will not be an issue to my understanding when you use a New IP Address for the new CIFS server DEPT-PROD1.  In other words - on the Celerra, you have now two CIFS servers using two different IP Addresses - but only the new CIFS server is joined to the PURPLE AD and available to user access.  You need not to delete the old CIFS server on the Celerra as long as you don't need the same IP Address used by the old CIFS server.  Hope this answers your query.  On a side note - I am not sure what exactly you mean to say by "pre-stage computer object DEPT-PROD1 in Purple AD" - does that mean, you are creating a computer account in the AD beforehand? This may not be needed, as when you join the CIFS server from the Celerra, it automatically creates the Computer account in the AD under the specified OU.  Thanks,Sandip
Hi folks-  Our organization is retiring one AD domain (ORANGE), and I'm tasked with moving all of our CIFS servers into a new AD domain (PURPLE).  We have a trust relationship between them, and I've ACL'd every file with rights from both domains, ie.e. \\ORANGE-PROD1\ADMIN has Full Control for ORANGE\NAS-Admins and PURPLE\DEPT-NAS-Admins.  I've been reading and re-reading Managing EMC® Celerra® for the Windows Environment and Configuring CIFS on Celerra and I think I've got a problem with my plan.  Here are my high-level step to move CIFS servers from ORANGE to PURPLE:      My problem is, I think when I unjoin ORANGE-PROD1, the interface IF_PROD1 is still in use (can't find any docs that tell me one way or the other).  Do I need to add a step to delete the CIFS server to free up the interface?  I was hoping to not delete anything, until all steps were 100% complete.  Is there anything else that I haven't accounted for?  Thanks!
Migrating CIFS servers between domains