NT to Windows 2003 Migration
Posted on 2006-03-22
I have a network with 26 NT Servers in a Domain with 180 Users.
I want to migrate to Windows 2003 avoiding a "big bang change over" if possible.
I am testing senarios in a test network.
At the moment I have upgraded an NT 4 PDC in the test environment and installed 2 new DC in the environment too.
This obviously moves all the users and groups accross.
I followed this procedure
1. Create a new NT Server as a BDC on the existing NT Network
2. Give it time to replicate
3. Turn off the BDC then put it aside - this gives you a copy of your NT domain and everything on it so if anything goes wrong you can promote it to a PDC and you have your network back
4. Upgrade the existing NT PDC to Windows 2003 with Active Directory
5. Join the Windows 2003 Server to this upgraded Domain and promote it to a Domain Controller
6. On the new server setup DNS, move the FSMO Roles and set Global Catalog
7. Run DCPromo on the upgraded NT machine to remove it from the domain for rebuild or decommision
So far so good, all working correctly.
Now whats the procedure with the rest of the network.
Remove the Live NT PDC
Plug in the new 2003 DC with the Upgraded domain
What will I have to do with Existing 2000 and NT servers (I also have 1 other BDC) or will these work with the new 2003 domain controller as it is in mixed mode.
What will I have to do with the exist XP clients (180) will I have to connect them to the new domain ?
Is this the best way to migrate this network, given that I want to avoid a big change over and I want to keep the same domain name.