If you check each users' profile, you should see that they have KiX32.exe assigned to them as a legacy logon script. If you have both KiX32.exe and a script called KiXtart.kix in the \Netlogon share then it should work for ALL of your users.
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.