If a user initiates a log out and removes their smart card, but then clicks the Cancel button in the log out confirmation dialog, the screen will not lock when the smart card is removed.
Workaround: Choose one of the following workarounds.
Turn off the Logout Confirmation Dialog in the Startup Style Manager.
If the screen does not lock when the smart card is removed the user should log out and log in. The session will be restored and the screen will lock when the smart card is removed.