I have collected some upgrade considerations from a couple colleagues of mine and have been sharing them on our internal technical DLs as the question comes up. I have gotten positive feedback on the notes and have been encouraged to post them. So, here they are. Though, the real thanks go out to my colleagues Tom and Arren. Further guidance on AD upgrades has been released to technet. The current title of the document "Microsoft Product Support Quick Start to Adding Windows Server 2008 or Windows Server 2008 R2 Domain Controllers to Existing Domains" can be found here. http://technet.microsoft.com/en-us/library/ee522994(WS.10).aspx
Here are some of the problems customers may run into when upgrading W2K3 AD deployment to W2K8 and/or W2K8R2 AD deployment:
b. For DNS Servers
c. For DCs running on hyper-V & VMWARE
a. install a UPS
b. brief all admins on the risks of USN rollbacks caused by restoring snapshots on DC role guests. Review http://technet.microsoft.com/en-us/library/dd363553(WS.10).aspx
c. P2V conversions should be done in offline mode. If converting multiple DC’s in same forest, then all need to be offline @ same time.
d. Disaster Avoidance & Recovery
a. Enable delete protection on OU containers
b. Enable system state backups
c. If using 3rd party backup, test system state restores + alternant backup like Windows Server backup so that PSS can restore when 3rd party product fails to restore
9. ADMIN STUFF
10. RECYCLE BIN STUFF
a. With Identity Lifecycle Manager (ILM), including Feature Pack 1 (FP1), the Management Agent for Active Directory is not supported with the Recycle Bin feature. KB2018683
Love the new look.
Might be worthwhile to add support.microsoft.com/.../982020