Hi, I need to find out the system requirements for an ISA server on win2k SP2 to manage 4,500 users (1,500 concurrent). Can anyone provide a definitive answer? Thanks Andy Andy Cain Technical Support BMS (UK) Limited BMS House 10 Churchill Park Colwick Nottingham NG4 2HF +44 (0)1159876339 mailto:ac@xxxxxxxxxxxxxx