When asking a question on this SuperUser site, it is helpful to include a tag for the particular version of the software being used, like microsoft-excel-2007, microsoft-excel-2010, microsoft-excel-2013, microsoft-excel-2016, microsoft-excel-365, etc.
This tutorial shows a screenshot of the version, under File->Account tab. Just below the "Office" logo, it shows the text "Subscription Product / Microsoft Office 365 / Belongs To: ... / This Product Contains ..." and then a list of product logos and a Manage Account button.
That's how Office 365 works. However, what's the right answer when that label is gone?
Is there a good systematic way to find out?
File-Account
?File
>Help
, there should be a screen telling you the product is activated. It does normally include which version of that product.