AD consists of a parent domain and 2 child domains (ADMIN & ACADM).
Win2003 server in ADMIN (not a DC) sees SOME workstations in sibling domain (ACADM)
Selecting "Search AD" from within my network places the WIn2003 server finds the target workstations.
When you attempt to manage the workstation from with AD search results you get "Network path not found". The Win2003 server can Remote Desktop to any of the misssing workstations without needing to use a FQDN. Problem exists on multiple hosts in the ADMIN domain, including the DC.
All workstations connect to INTERNET, AD and exchange w/o issues