Microsoft SBS 2003 User CALs

Hello All,

I have an issue with our Domain Server. It has SBS 2003 installed. We have purchased and installed an extra 25 CALs. This has been working fine until Saturday Morning. When all the Licenses for those 25 CALs dropped off the Licensing Screen on Server Management. Nothing is in the event logs. On Monday morning, i had to re-install those user CALs by entering in the license keys and activating them.

What can cause SBS 2003 to lose those CALs?

We did have a space issue as well on Saturday morning. Can this cause it?

Regards,
MElissa