Hi,
Hope everything is going well.
Yes, we can use the task sequence variable “SMSTSRebootDelay” to restart the clients immediately without waiting. It specifies how many seconds to wait before the computer restarts. If this variable is zero (0), the task sequence manager doesn't display a notification dialog before reboot and the Restart Computer step will restart instantly.
Hope my answer could help you. Should you have any questions or concerns, please do feel free to contact me.
Best regards,
Simon
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