Intune Restart Behavior with Deadlines and Hibernate Scenario

Intune doesn’t restart or show countdowns while the device is in hibernate. Enforcement only happens when the device is powered on and the Intune management extension and Windows are running.

From the available information, the behavior can be summarized as follows:

1. How the restart grace period works
   • The restart grace period starts as soon as the Win32 app installation finishes.
   • The device restart grace period and the countdown dialog timing are configured in the Win32 app assignment:
     • Device restart grace period (minutes)
     • When to display the restart countdown dialog box before the restart occurs (minutes)
     • Whether the user can snooze and for how long
   • These settings only apply when Device restart behavior is set to Determine behavior based on return codes or Intune will force a mandatory device restart.
2. What happens if the device is hibernated before the deadline
   • Hibernate powers the device off to a low‑power state. While in this state:
     • Intune cannot send or process notifications.
     • Windows cannot display countdown dialogs or perform the forced restart.
   • Therefore, the 11:45 PM countdown and the 12:00 AM forced restart do not occur while the device is hibernating.
3. What happens when the device is turned on after the deadline
   • When the device powers back on and checks in with Intune, it evaluates the app’s restart grace period and deadline.
   • Because the deadline has already passed, the device is treated as overdue. The enforcement behavior reverts to “normal behavior for overdue deployments” once the grace period has expired.
   • In practice, this means:
     • The user no longer has the full grace period; enforcement is applied as soon as policy is processed.
     • The device can be forced to restart to complete enforcement. Any countdown or notification behavior at this point is governed by the configured End user notifications and grace-period UX settings, but there is no additional “wait until the original deadline” because that time has already passed.

So for the described scenario:

• No restart or countdown occurs during hibernate.
• After the device resumes (the next day), once Intune policy is processed and the system sees the deadline is in the past, it enforces the restart as an overdue deployment. Depending on notification configuration, the user may see a short countdown or an immediate forced restart, but there is no new full grace period.

References:

• Win32 app management in Microsoft Intune
• Common questions, answers, and scenarios with policies and profiles in Microsoft Intune
• Deploy applications with Configuration Manager
• Policies for update compliance, activity, and user experience