We use Windows 2008 terminal servers with ZCM 11.1.
One of our user has a message again and again (1-2 times a day):
"ZENWorks - Logging off
ZENWorks policies have been applied on the device which require a relogin to take affect. Save your work before relogin occurs."

The policies didn't change nowadays, and just one user gets the message.
If this user logs in another terminal server he gets same message there.

The zmd-messages.log:
[BundleManager] [BUNDLE.MachineShuttingDown] [Could not perform task because the machine is currently shutting down.] [] [855638aa2a36dc9f8cfb89f4a6299c6e]

What is the problem, what can I do?

Thank you,