Windows Server 2008 R2 Active Directory

[ryantremblay]

Hello we just upgraded our two domain controller at our main site to Server 2008, everything working. We went to our other site to replace the domain controller with a better server. Noticed since we upgraded our main servers that we are getting tons of KCC errors on our server at the remote sites, we cannot demote it to put the new domain controller in place. Everything was communicating fine until we did the upgrade at our main site how do we fix the 2003 DC that won't comunnicate with the other domains? They ping fine, but if we try to connect to the other DC from the remote site we get access denied. Any help would be appreciated.