We get the same error on our Citrix server. It would appear that other functions work correctly (we only allow users to archive and to delete from the archive). We also would prefer to use only the lite client.
Reinstalling the client has not helped. Also, the url mentioned earlier about the blank.gif test seems to work okay, a blank page comes up.
Enterprise Vault v6 sp2
Windows Server 2000 sp4
Citrix Metaframe XP
Outlook 2003
Error:
"You must have a network connection in order to delete archived emails"