I have 4 DC, 2 in my location and 2 in other site location running win 2003 SP2. We decide to replace these servers and bring in 4 new servers running win 2003 R2 x64.
I go through steps that I need to take; your expertise and recommendations are highly appreciated. Our business is mission critical and we don’t want this migration effect 24/7 running business.
In current environment Domain Functional Level is Windows 2003 and Forest Functional Level is Windows 2000.
Since we don’t have any Windows 2000 DC, I’d like to raise forest functional level to Windows 2003 before adprep,forest prep for Windows 2003R2. We have Exchange 2003 and CRM 4.0.7333.3 Servers. Do you think raising forest functional level or doing adprep,forest may affect these servers? What would you advise for the steps that I need to take in terms of Backing up the existing environment, checking Replication status, service pack levels, any Microsoft update to be removed or installed, Sysmantec antivirus settings, promoting new dcs, moving the operation master roles and demoting the existing dcs. Not to forget existing dcs have DHCP, DNS, print and file server roles. Would be wise to bring new dcs as member server and remove some of these roles before promote them? Do you suggest to keep one of the new dc 32bit in case there will be any compatibility issue for the existing systems like Rfax vs.?
After documenting the necessary steps, I’d like to open a case to Microsoft before taking the first step. In case of a failure I’d like to get them on the phone since the business must run somehow. Which number do I need to call for that in Canada?
It is a big project with tight deadline in September so any help would be most welcomed.
Thanks in Advance