Im receiving the following erros in Event viewer under Directory Service. I have to this date not been able to resolve this issue. This is happening on my network. All our servers are in the same domain, but separate OU's and the servers are all WIN2K. "The Directory Service consistency checker has determined that either (a) there is not enough physical connectivity published via the Active Directory Sites and Services Manager to create a spanning tree connecting all the sites containing the Partition DC=app,DC=chomes,DC=com, or (b)replication cannot be performed with one or more critical servers in order for changes to propagate across all sites (most often due to the servers being unreachable).