If you can’t Install or Activate Office setup 2016 for Mac, then you can follow the given steps:
Microsoft Office 2016 can’t be Opened Because it is from an Unidentified Developer:
If you haven’t already, upgrade your device to MacOS Sierra 10.12.
Click OK and wait 10 seconds.
Move the download file to your desktop and try again.
Hold Control and click the file on your desktop.
Installer stuck at Verifying:
Click OK. Wait 10 seconds and try again.
Update to macOS Sierra (10.12).
Restart your computer and install Office 2016 again.
Get Microsoft Office Setup here : Office.com/setup
Can’t Download the Office 2016 for Mac Installer:
Start the download again using Safari.
If you’re not using the Office Home & Student license and you’re still unable to download the file, delete the installer again.
Now download it using Safari from this link instead.
For more details, visit : www.office.com/setup