Get-AppxPackage -Name "*MSIX*" The native Add-AppxPackage cmdlet cannot install for all users. Instead, you must use the DISM module cmdlet: Add-AppxProvisionedPackage .
To check support, run:
$fullPath = Resolve-Path ".\MyApp.msix" Add-AppxProvisionedPackage -Online -FolderPath $fullPath Redirect output for auditing: install msix powershell all users