SBS2003 adding second DC adprep questions

I am trying to add a domain controller in my SBS 2003 R2 environment for redundancy.
The domain was built a few weeks ago with SBS 2003 R2 and I am trying to add a DC and I get
the message that the Forest hasnt been prepped for it.  Now I know that you usually have to run Adprep / forestprep and then domainprep to go from 200 to 2003 and from 2003 to 2003 R2 to extend the schema, but I figured since the domain was created with SBS 2003 R2 I shouldnt have to do that.  My question is , is it because I am trying to add a full 2003 R2 server as a DC that I have to run adprep and second, is there and danger in running adprep on the SBS server.
I read on the Microsoft site that it is possible to have a second DC in an SBS environment.
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bumppbrAsked:
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Olaf De CeusterCommented:
You do have to run the adprep on SBS R2. This is because sbs r2 is still based on SP1.
You can have as many DC's as you like but no PDC's (Only one: SBS)
Make sure you use the Add server wizard to create the new server account (In server console) and than use the connectcomputer wizard to join your second server.(http://your server name/connectcomputer from server 2)
Let me know if you need help with your adprep and the joining process.
Hope that helps,
Olaf
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