Which powershell command can help me know whether a specific MS OFFICE update (in my case it’s listed in Microsoft Office Professional Plus 2016 in view installed updates of Control panel).
Get-hotfix, qfe all gives windows patch detaills only
You can search for office updates the same way you search for installed software in general. The most common way is to query the according “Uninstall” registry keys.
I totally agree with Olaf. You might also find what you want or at least get started with this:
$PatchRegPath = 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\*\Patches\*'
(Get-ItemProperty -Path $PatchRegPath).DisplayName