A cross-ref has a NULL GUID in it's nCName attribute. Cross-ref DN: %2 nCName attribute (Partition name): %1 If this Partition ...

A cross-ref has a NULL GUID in it's nCName attribute.
 Cross-ref DN: %2
 nCName attribute (Partition name): %1
 If this Partition is not a new tree partition, then consider removing this partition and/or cross-ref from the enterprise.  It is normal for a separate-tree root domain crossref ncName to not have a guid temporarily after dcpromo of a Windows 2000 domain controller. A Windows Server 2003 domain always has a guid.  Without the guid, the KCC will not honor the cross ref and replicate in a replica of the new domain. Please allow time for knowledge of the guid to replicate out to the forest.  If the  guid is still missing, please verify that a replication path exists from the recently promoted domain controller to the rest of the forest.