1.  Download the newest 7-zip .exe file here: 7-Zip

2.  Create a .bat file: (I named mine 7-zip.bat)

        @echo 7zip exe silent install

        start /wait 7z1900-x64.exe /S 

        @Echo Done

3.  Add both the .exe file and the script to a zipped folder and upload & associate to the managed installation.

4.  Override the default installation and call the script (7-zip.bat)

32 Bit Windows Install

msiexec /I 7z1602.msi /qb-!

32 Bit Windows Uninstall

msiexec /X {23170F69-40C1-2701-1602-000001000000} /qb-!

64 Bit Windows Install

msiexec /I 7z1602-x64.msi /qb-!

64 Bit Windows Uinstall

msiexec /X {23170F69-40C1-2702-1602-000001000000} /qb-!