Hi Jim I am Anwar, I posted my query but didn't get any reply. What I need to know is that is this possible that we can limit the session through ISA to one session only per user. Means that if a person has been authenticated by ISA server from one PC the same can not be authenticated from some other Pc at the same time. Actually we have given internet access to limited # of staff. But some of the staff have given away their passwords to those who do not have access to internet, and they connect using the authorized users password. My manager needs to restrict the staff to single session only. Please help me out Anwar Ahmed Siddiqui Assistant Systems Officer Information Technology Department Pakistan Petroleum Limited Tel: 111568568, Ext: 569