Recently when troubleshooting some Maintenance Window issues for SCCM 2012 clients, I was watching the client log ServiceWindowManager.log
Each Maintenance Window has a type. For example I set a Maintenance Window for All Deployments.
You can see that this had Type=1.
If you are curious to see what other maintenance windows you may have set for the client, you can check out this link or look at the table below.
https://msdn.microsoft.com/en-us/library/jj155420.aspx
Value | Service Window Type | Description |
---|---|---|
1 | ALLPROGRAM_SERVICEWINDOW | All Programs Service Window |
2 | PROGRAM_SERVICEWINDOW | Program Service Window |
3 | REBOOTREQUIRED_SERVICEWINDOW | Reboot Required Service Window |
4 | SOFTWAREUPDATE_SERVICEWINDOW | Software Update Service Window |
5 | OSD_SERVICEWINDOW | OSD Service Window |
6 | USER_DEFINED_SERVICE_WINDOW | Corresponds to non-working hours. |