We have to use these configuration in pdm_configure "Object Manager Display Name" and "Web Host"
1. On the ServiceDesk Server
verify ping to alias return the ip of this server
define the alias/fqdn in the configuration page
Changes done by pdm_configure
All of the changes was done by pdm_configure, except NX_LOCAL_SERVLET_SERVER_URL still pointing to the hostname. We have to modify this variable to FQDN