There is nothing special at all about using the command line to deploy the PolicyPak Cloud Client. It will honor a silent install and will not require or request a reboot.
Examples of typical silent command lines to run are below:
To install the PolicyPak Cloud Client quietly with no UI:
msiexec /i "C:\Temp\PolicyPak Cloud Client for company name.msi" /qn
To install the PolicyPak Cloud Client quietly with no UI and no restart:
msiexec /i "C:\Temp\PolicyPak Cloud Client for company name.msi" /qn /norestart
To install the PolicyPak Cloud Client quietly using JOINTOKEN with no UI and no restart:
msiexec /i "C:\Temp\PolicyPak Cloud Client for company name.msi" JOINTOKEN="AXBCDeVXbieqP9WUWQwnYM=" /qn /norestart
Note: Replace JOINTOKEN="AXBCDeVXbieqP9WUWQwnYM=" with the relevant JOINTOKEN string for your environment. See this KB for more information on how to use JOINTOKEN: https://kb.policypak.com/kb/article/911-policypak-cloud-automatically-join-groups-with-jointoken/
More info on MSIEXEC command line switches can be found here: https://docs.microsoft.com/en-us/windows/win32/msi/standard-installer-command-line-options