Citrix not an issue, he said he has deleted and recreated the group to no avail.

Addict, You say that Windows XP systems don't see the group. Do NT 4 Server/Workstation or Windows 2000 systems see this group?

How large of a Network are we talking here? 2 DC 50 DC how many sites? How many Domains? Global Catalogs?

Bandwidth or Replication issues? Rights issues? Who has rights to see/edit/modify this group? Wrong ACL?