Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
If you have purchased a new Office licence or subscription from a 3rd party retailer, did you log into this link to associate the Office licence to your Microsoft account?
https://setup.office.com/Home?wa=wsignin1.0
2
If you have done that or if you purchased the Office licence/subscription directly from Microsoft, then you can go to your Microsoft account on this link to download and install Office on your PC, without the need for a product key.