Automatically log off users when logon time expires (local)
Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options
Determines whether to disconnect users that are connected to the local machine outside of their user account's valid logon hours. This setting affects the Server Message Block (SMB) component of a Windows 2000 server.
When this policy is enabled, it causes client sessions with the SMB server to be forcibly disconnected when the client's logon hours expire.
If this policy is disabled, an established client session is allowed to be maintained after the client's logon hours have expired.
This policy is defined by default in Local Computer Policy, where it is enabled by default.