for the moment, the major problem is replication issue.
my users in branc offices are experiencing 'outlook is retrieving data' pop-up box in their outlook 2003. and after researching, (and still going on) it seems to be the communication issue between GC servers in the branch office and the 2 GC servers in the same segment as e2k3 server. (1 of them being the e2k3 server) i came to this conclusion when i found out that the only office who uses a server that does not have a GC list, the users are not expriencing the pop-up.
now, i know we can judge if outlook is requesting data to a GC server or an exchange server by reading the pop-up message. but it seems to be random; at some branch office, it's netbios format, others are in fqdn format. so i figured it's both alternatively. since each branch servers (with pop-up) have GC list as well as exchange server. and GC relies on DNS replication to communicate. so if DNS serivce is not running properly, i guess GC list wouldn't be replicated at they should.
am i sidetracked?