Thank you all for replying...
Unfortunately the clien staff numbers is already 8 digit long, so I can't add more character in front of it
I'm still looking for a way to overcome this problem other than saying to the customer that it can't be done
, based on little testing, the username with all numeric have problems when the user tries to connect to CDE GUI, an error message appeared in /var/adm/messages:
Jun 13 16:23:37 uajkt1 /usr/dt/bin/ttsession[27496]: [ID 848021 daemon.error] _Tt_iceauth::make_auth_cookie(): timeout in locking authority file '/home/13598029/.TTauthority'
It seems that DT unable to create .TTauthority in the user's home directory