Hi, A very basic query: What is the licensing scheme for MS-Exchage? I mean, is it per mailbox or per client accessing the server. Suppose, I have 40 CALs for Exchange and there are 300 mailboxex on it, but at a given time, only 40 clients are accessing the mail server. Is this situation OK? I am asking it for my knowledge purpose only. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> Regards, Chand Deshwal (M.Tech CS&E, MCSE, CCNA) Network Administrator Kampsax India Ltd., Gurgaon ph: +91 124 6348259-62, Extn. 712 chand@xxxxxxxxxxxxxxxxx <mailto:chand@xxxxxxxxxxxxxxxxx> http://www.kampsaxindia.com <http://www.kampsaxindia.com/>