I've been looking at the server trying to determine what would cause it to "pull" someone's mapped drive. Online sources suggest that it might be a licensing issue, but the "server" in question is a NAS, and shows a per-server concurrent connection limit of 9999, which I am quite sure we are nowhere near hitting. Two other factors are that the disappearing drives seem to affect only a small percentage of my user base, and prior to switching to KiX, I never heard any reports of this issue. Since the only thing that has changed in my environment is the method of mapping drives, I have to assume that the two are connected somehow, whether XP or 2003 has some issue with how KiX passes the Use command through the network, or something in how my script is written, or some other more obscure issue. Since KiX has been around so long, the fundamental principle is no doubt sound. I just need to narrow down the possibilities.