Could someone please sanity check this task sequence? I need to upgrade a 2003 domain to 2012 R2 and would appreciate a second set of eyes. thx.
Goal:
1. standup two new 2012 R2 DCs
2. decomm three old DCs
3. raise DFL/FFL to 2012 R2
Current DFL/FFL = 2003 (one site, one domain, 3 DCs, 400 users)
3 Existing DCs (all to be decommed):
OldDC1 = Svr2003 Std Ed SP2 x64 (holds all FSMO roles, GC=yes)
OldDC2 = Svr2003 Ent Ed SP1 x86 (holds no FSMO roles, GC=yes)
OldDC3 = Svr2003 Std Ed SP2 x64 (holds no FSMO roles, GC=no)
New DCs to be added:
NewDC1 Svr2012 R2
NewDC2 Svr2012 R2
Proposed task Sequence:
* build and patch OS, then add ADDS role to NewDC1 and NewDC2 (do not yet add servers to existing domain)
* in the network config of new DCs, set the DNS server IP to the IP of OldDC1
* when installing ADDS, I will be prompted to run Adprep.exe - it will be run as part of installing ADDS - this will update existing domain schema as needed.
* add NewDC1 and NewDC2 to existing domain
* in the network config of the new DCs, set the DNS server IP to that of the local server
* make both GCs, make both DNS servers
* distribute FSMO roles thusly:
* DC1 = PDCE, RID (more frequently used roles)
* DC2 = SM, DNM, IM (rarely used roles)
* run dcdiag.exe commands to verify functionality
* power off OldDCs one at a time, waiting 24 hours between each shut down
* raise DFL/FFL to 2012 R2 after all old DCs are decommed