SCCM & Application Deployment - Automatically Rebooting During The Day

[CHiLL]

We have SCCM 1702 installed and push out applications. I have noticed that once an application has been installed and it requires a reboot - Software Center on the client machine will inform the user that it will restart in 90 minutes. Then after 75 minutes, a dialogue box appears on the bottom right of the screen, displaying a 15 minute restart countdown. Then the machine automatically reboots.

 

We use also deploy Software Updates via SCCM, which has an option to suppress reboots. This works fine.

 

When I deploy an application, it is scheduled as soon as possible, with a deadline 7 days after the deployment creation. I also allow 'Software Installation' to be allowed outside of the maintenance windows. However, I ensure that I leave the box 'System restart' unchecked.

 

We do have a single Maintenance Window on our collection that contains all workstations. Does this Maintenance Window also cover sub-collections, or any device that falls within it? Does it also apply if a deployment has been sent to a different collection, but the machines in question also appear in the collection with the Maintenance Window?