We are using a Barracuda Web Filter 310 that is communicating to our Domain Controllers for user authentication. When the Barracuda polls our servers, it is supposedly running a query from DHCP logs. The problem is that the query is sending over multiple IP addresses that are assigned to the same user and also have seen where an employee was terminated over 6 months ago but they still have an IP address assigned to them in the logs so any new user that gets that IP from our DHCP server is now being tracked/filtered as if they were the terminated employee. Barracuda said this is a Server2003 issue since their hardware is querying our Domain Controllers. Is there a way to purge this data on our DC or where in DHCP could we see this information to know what needs cleaned up? I never knew there was a list of IPs assigned to user accounts. Or possibly elsewhere on the server other than DHCP?