We have two sites. Each had an Exchange 5.5 server, I have recently upgraded/added an exchange 2000 box to both sites. While I am getting ready to decomission the 5.5 servers I am trying to get admin access to the mailboxes in the remote site. I had access before to the 5.5 mailboxes which were moved to the EX2K box. I have changed the default EX2K "deny access" to allow for my self and our domain admin group, but I am still getting the message "unable to display folders - IS could not be opened". We have a typical ISA server setup on each end between the sites...Am I missing something simple here? Can anyone help ? thanks in advance!