I am in a school environment and we limit students to a single login. At
a high school I am having problems if a student logs into a MAC and then
properly closes that connection. If they then try to login to a PC I get
an error message saying the user is attemping to login to to many
workstations at a time. We have about 40 schools and this is the only
one complaining about this issue.

Client File caching is already set to off and well and Level 2 OPlocks
are set to off.

Thanks for your input.