I have what I think is a simple question but I can't seem to find the answer. I have a parent domain (2003 SP1) and several child domains (2000 SP4). I want to extend the forest-wide schema with the second CD of 2003 R2 using adprep/forestprep via the Schema Master domain controller in the parent domain. I ran this in a test lab and received a successful completion message. To make sure the schema version number was updated from 30 to 31 I looked at the Schema Version subkey under HKLM\System\CurrentControlSet\Services\NTDS\Parameters. The problem is that there are two registry entries: "Schema Version" and "System Schema Version". The "Schema Version" subkey has a value of 31 and the "System Schema Version" subkey has a value of 30. I waited a couple hours but the second value never changed to 31 (I also tried a reboot). I do not intend to install the R2 capabilities on this domain controller. I just want to update the schema so that the R2 capabilities can be used downstream (the child domains 2000 DCs will be updated to 2003 R2 later).
If I run forestprep in my production system will the schema change replicate forest-wide even though I don't actually install R2 on the schema master?
I'm also worried as to why the "System Schema Version" did not change from 30 to 31, however, the "Schema Version" did change from 30 to 31.
Thanks for any advice you can provide.