Run a custom Robocopy script every day

Run a custom Robocopy script every day

I have a robocopy script that I need to run from 3:30am to 5:30am every day:

robocopy {SOURCE} {DESTINATION} /MIR /R:1 /W:1

The reason we use this script is because it is a very large folder (400-500Mbs) and we need to only copy the changed files to conserve bandwidth. There are close to 1000 computers at many different locations. What is the best solution for this using Endpoint Central? I see there is a custom script option but there is no option to select a deployment policy that executes the script at the scheduled times. The only option for Custom Scripts is Once, During every Logon, During Subsequent Logon, and Every refresh cycle. This won't work for us as we need to run this script when there are no users on our network.
Is the only option to use the "File Folder Operation" in the Configurations section? This option doesn't allow us to run the copy during a specific time frame. Our refresh cycle is 90 minutes and we can't have the script running every refresh.

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