There is nothing special at all about using SCCM to deploy the PolicyPak CSE. It will honor a silent install and will not require or request a reboot.
Examples of typical silent command lines to run are below:
msiexec /i “C:\Temp\PolicyPak Client-Side Extension x64.msi” /qn
msiexec /i “C:\Temp\PolicyPak Client-Side Extension x64.msi” /qn /norestart
More info on MSIEXEC command line switches can be found here:
The only caveats are around PolicyPak Browser Router: