Mike Baudino wrote:
All,
We're a bit behind the times... I've got an AD environment for our developers. The DCs are all ESX VMs. Not all VMware hosts are yet upgraded to support Win2k3 SP1 or R2. Some are upgraded to support SP1, none will support R2, and some won't support either. I'm being pushed to get SP1 per security. What I'm looking for is whether anyone has experienced any problems running most DCs as SP1 with some still SP0 for an extended period of time (three months -- potentially more). The DCs are not running DNS Server nor any other service than merely running as a DC.

There should be no problem with running SP1 and DCs without SP1 for some time in the same domain but You should be aware of few things which changed with SP1.

For example there is change in the list of attributes which are preserved in tombstone:
http://blogs.technet.com/efleis/archive/2005/07/12/407648.aspx

This may not affect You, but its better to know this.

Another thing is security concern regarding dynamic objects and problem which is present in pre-SP1 systems:
http://blogs.dirteam.com/blogs/tomek/archive/2006/06/23/1175.aspx

But from my experience there are no major issues which are caused by DCs with SP1 and without SP1 in the same domain

--
Tomasz Onyszko
http://www.w2k.pl/ - (PL)
http://blogs.dirteam.com/blogs/tomek/ - (EN)
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