Hello,
SQL Server does not keep track of CAL licenses.
Keep those licenses in a place where you can find them, in case Microsoft asks for them.
For licensing questions, you can call 1-800-426-9400, Monday through Friday, 6:00 A.M. to 6:00 P.M. (Pacific Time) to speak directly to a Microsoft licensing specialist.
You can also visit the following site for more information and support on licensing issues:
http://www.microsoft.com/licensing/mla/default.aspx
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com