We have 6 servers running Windows Server 2003 in our organisation, which are connected with eachother over a VPN and are in a forest.
Last week the root server crashed and I replaced it with a new one running Windows Server 2008. Now I need to recreate the forest trust relationships, but i'm having problems getting this done.
On the remaining 5 2003 servers the trust relationship to the root server still exists.
From what i've found so far I need to start with setting up DNS on the new 2008 root server so the subdomains and servers can be reached.
I've setup a conditional forwarder for one of the subdomains, so now this subdomain and server can be pinged.
But when I try to create a new conditional forwarder for another subdomain, I get an error: 'A problem occured while trying to add the conditional forwarder. A zone configuration problem occured'.
In AD Domains and trusts on the new 2008 root server I can create the 2way trust with the subdomain that I can ping.
But it couldn't be validated, so I deleted the trust relationship on the 2003 subdomain server and tried to create it again, but then I get the error: 'The operation failed. The error is: The parameter is incorrect.'
Is this related to the windows version or something? The domain functional level is set to 2003 for all the servers. So it should be possible to create a forest trust between a Windows Server 2003 and 2008 right? (both are R1).
Any help on this issue would be much appreciated.