Questions about cals. If I have 2 DCs servers and 60 Windows XP computers, One of them is File Server but use it only 30 users. As a licensing this?

your question is not clear all i can understand is you have a problem with licensing so in this case I suggest contacting Microsoft Licensing Center for detailed explanation. http://www.microsoft.com/licensing/contact-us.aspx Also you can call 1-800-426-9400 (select option 4), Monday through Friday, 6:00 A.M. to 5:30 P.M. (PST) to speak directly to a Microsoft licensing specialist. Worldwide customers can use the Guide to Worldwide Microsoft Licensing Sites http://www.microsoft.com/licensing/index/worldwide.asp to find contact information in their locations.http://www.virmansec.com/blogs/skhairuddin