Replace the '&' ampersand with the 'And' and try to avoid special characters in shares/groupnames/usernames/computernames/DNS.

However, I meant e.g. group limitations, not KiXtart.

Also, be aware that if you assing a user to a group without refreshing the Kixtart token cache (Windows Nt/2000/XP only), that KiXtart might not detect the new group assignment. Please see the KiXtart Manual for ways to refresh the token cache.
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There are two types of vessels, submarines and targets.