you are trying to add/edit a new LDAP server and are getting the following message
Failed to connect to LDAP server, network timeout ,DDS error 800404 ..
This is caused when you have a firewall between the Symantec brightmail gateway and the LDAP source and port 389 and 3268 are not open.
Open port 389 and 3268 in the firewall
Symantec brightmail gateway 8X and 9X