This is relatively well explained in the Microsoft site. You should do your minimal homework or work before asking questions here... we're all very busy and this is good-willed peer-to-peer advice... not "cool" for you to put the list down like you did in your previous postings. Anyway, you need: - For each server on which Exchange is installed: - 1 Exchange Server license - 1 Windows NT or 2k Server license - For each Windows client that connects to (any) Exchange server: - 1 Exchange CAL (Client Access License) - 1 Windows (9x, NT, or 2k) license - 1 Windows NT or 2k Server CAL (Client Access License) - For each non-Windows client that connects to (any) Exchange server: - 1 Exchange CAL (Client Access License) - 1 Windows NT or 2k Server CAL (Client Access License) -----Original Message----- From: ktsuresh [mailto:ktsuresh@xxxxxxxx] Sent: Monday, April 29, 2002 1:57 PM To: [ExchangeList] Subject: [exchangelist] Licencing http://www.MSExchange.org/ can anyone throw some lights on how the exchange licence works ? (the issue is , do u also need the same amount of NT user licence as the exchange users ?) thanks ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: alopezdeayala@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')