Zoom Client install/setup: Unable to setup standard users

Zoom desktop client for Windows 7 locks out config options for standard users (see attached sample).

No matter how we install the desktop client, be it via system wide MSI or local/userspace EXE, the options are mostly locked out.

We've tried:-

1) Installing & editing admin templates via gpedit.msc

2) Manually adding ADMX templates to %systemroot\PolicyDefinitions

Neither bears any fruit.

The following produces a workable profile for administrators but not standard users:-

msiexec /i ZoomInstallerFull.msi ^
/levx zoommsi.log ^
ZNoDesktopShortCut="true" ^
ZRecommend="AudioAutoAdjust=1;Min2Tray=1;zSilentStart=1;AutoStartAfterReboot=0;AutoStartInSystemTray=1;EnableHIDControl=1;EnableFaceBeauty=0;EnableHardwareAccForVideoSend=1;EnableHardwareAccForVideoReceive=1;DisableZoomApps=0;Use720pByDefault=1;AutoHideToolbar=1;ConfirmWhenLeave=0;DisableVirtualBkgnd=0;DisableVideoFilters;SetScreenCaptureMode=0;VideoRenderMethod=0;zDisableIMLinkPreview=0"

Any thoughts please?

Platform: Windows 7 Ultimate x64