We are having difficulty prepping A.D. for an upgrade to 2003 Server R2. We appear to be having a replication issue. Here are the errors we are getting from adprep /forestprep:
"There is a schema conflict with Exchange 2000. The schema is not upgraded."
When we ran dcdiag /test:fsmocheck on one of the DC's... we got this error:
"Warning: DcGetDcName(GC_SERVER_REQUIRED) call failed, error 1355
A Global Catalog Server could not be located - All GC's are down."
We host our own internet DNS and our domain name was switched from AD-integrated to standard primary. We aren't sure if this is what is causing the replication issue/errors we are getting or if it's just part of the problem. Or... not the problem at all?
Anyone have any ideas? We need to get this fixed asap!