So, since I have seen posts concerning users who don't run the script, and you have seen the issue where drives map, but then drop out later, and neither of these problems seems to have a solution, I've got my work cut out for me. I checked those users, and all seem to have the logon script mapped appropriately. I know for a fact that the script and the executable all replicated to all domain controllers. I'm going to go digging through ADSIEDIT to see if I can see anything wonky about the logon script in their actual user objects. There may be a hint there. Unfortunately, I don't have much longer to futz around with KiXtart. The mapped drives these users aren't getting are necessary for an in-house application to function. If I can't get it working within the next day or so, we will have to look at another solution.