>Thank you kevin. How about other user properties (such as full name, address) which are kept by the primay domain controller. Can we get them?

Not easily, if at all. An indirect way I usually use is to get all this information from the Exchange Server data for a user. There is plenty of info easily available that way, if you use a corporate email system like Exchange Server.

Or, you can make your own user table to contain the info, that's the second method I use, and create a record for each network username (with that being the unique PK). It has additional advantages of keeping full name, last login, length of session, anything like that you want to customize and keep tabs on.