We've been clearing the certified devices every seven days at 3:00am all 
semester without a problem.  Until about 2 weeks ago when the certified 
list was cleared it also kicked the users off (which is what we 
wanted).  Two weeks ago it stopped kicking the users off when it cleared 
the certified list.  I removed and then re-added the setting just to 
make sure it didn't get confused somehow.  Last time we had to re-create 
it after the time change.

We do have the heartbeat timer set for 5 minutes but haven't received 
complaints from our students.

Grzeczka, Timothy J. wrote:
> It sounds as if your timer is going off and kicking everyone off. You'll
> want to check the settings for it:
>
> On the left menu under the Device Management Group choose Clean Access
> and then choose Timer. Check to see if "Enable certified device list
> clearing timer" is checked and see what the date and time for the timer
> is set for. I don't recall what the timer's default settings are. 
>
> We have ours set to kick the users every seven days on Thursday at
> 4:30am. We decided on Thursday for a few reasons but the biggest one was
> to be sure that the student machines get Windows Updates automatically
> when they are released on Tuesdays. Of course, when they release them
> off schedule, it can throw this off a bit, but that has only happened a
> few times.
>
> From your message, I bet your timer is set to clear once a day. Also,
> check to see what your heartbeat timer is set for:
>
> On the left menu under the Device Management Group choose CCA Server and
> then press the Manage button for your CCA box. From there, choose the
> Misc tab and then choose heartbeat timer. The heartbeat timer checks to
> see if a user is still online every X minutes. We ended up disabling
> this after some complains from users about being kicked off when their
> laptops when into sleep more or hibernation overnight.
>
>
>
> Timothy Grzeczka
> Network Analyst
> Dominican University
> [log in to unmask]
> Voice - (708) 524-6568
> Fax - (708) 488-5111
>