Here is what I tried, however, it's not uninstalling...nothing happens:
Global $sUserName = "zthurlow"
Global $sPassword = "password"
Global $sNetwork = "network"
RunAs($sUserName, $sNetwork, $sPassword, 4, "MsiExec.exe /x {5B51E040-91DA-11E7-A3C5-54EE755D74E2} /qn")
When I try using "msiexec.exe /x /qn <product>" it launches the uninstall process, but needs me to click yes to a few prompts, which I can't do. This needs to be run through a GPO with no user prompts in the background. When I run "MsiExec.exe /x {5B51E040-91DA-11E7-A3C5-54EE755D74E2}" from an elevated command prompt, it does run perfectly with no prompts. I think we are close!