You install Office Updates and Office Volume License tells you it isn't activated.

You install Office Updates (namely KB3141505, KB3128055, KB3127907 or KB3118330)  and Office Volume License tells you it isn't activated.

Go to the command prompt, run as administrator.
CD \Program Files (x86)\Microsoft Office\Office16 or the equivalent.
Type- cscript ospp.vbs /dstatus
Grab the "Last 5 Characters of installed product key:" for each product has an error errorse)
Type- cscript ospp.vbs /unpkey: and the last 5 of the product key.