+1  A: 

I know this was posted almost a month ago but I believe once you set those domain groups the only way to change them is to uninstall/reinstall SQL Server. Of course, you can alaways change service accounts but the domains will remain the same unfortunately =(. It's also recommended that if you're running 2008, as you stated, to use service SIDs for SQL Server services.

Hope this helps a little.

ajdams  2009-09-25 13:24:35
25 points to you for submitting an answer - this is exactly what I discovered a few days after I posted this question. I'm surprised that there's no way to change these groups - you'd think that they're stored somewhere, and there would be some way to change them, but a full un-/re-install seemed to be my only choice.
rwmnau  2009-09-25 20:22:05
Thanks, I know how hard it is to find answers about SSAS out there since it's pretty high level stuff.
ajdams  2009-09-25 20:46:19

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