Bryce, I used the administrators group as an example but for me the INGROUP function fails for all groups, both local and global. I should perhaps further clarify that the scripts in question are domain logon scripts.

This one function consistantly fails, regardless of the OS on the client machine. This puzzles more all the more because other commands and functions all function correctly, or at least those I've tried. Admittedly some don't work quit as I first expected but they do work.

Out of pure desperation I have even downloaded and installed a fresh copy of Kixtart, all to no avail.

If this failure of INGROUP only occured on a single server I could understand that there is a problem but in this case there are 6 logon servers, all giving identical results.