Timeout for dialog boxes
Computer Configuration\Administrative Templates\System\Logon
Determines how long the system waits for a user response before it uses a default value. The default value is applied when the user does not respond to messages explaining that any of the following events has occurred:
The system detects a slow connection between users' computers and the server that stores the users' roaming user profiles.
The system cannot access users' server-based profiles when users log on or off.
Users' local profiles are newer than their server-based profiles.
You can use this policy to override the system's default value of 30 seconds. To use this policy, type a decimal number between 0 and 600 for the length of the interval.