As you might predict from Microsoft, there are multiple URLs with different behaviors.
https://portal.office.com allows me to login with the address the installation pushed me to use for Office 365, of the form me@mycompany.onmicrosoft.com address, but only offers "Download the latest version of Office".
https://stores.office.com/myaccount/home.aspx only lets me log in with my regular Microsoft address, of the form me@mycompany.com, not my Office 365 address as above, but seems aware that my Office subscription is not associated with that address. It offers 2 approaches:
- Sign in with your other Microsoft account
- Enter your product key to activate Office, but this doesn't work if you bought Office 365 online (Microsoft announces on its "Find your Office product key" page "Most customers won’t receive (and don’t need) a product key to get started with Office. For instance, you don't need a key if you bought Office from Office.com or the Microsoft Store online")
The Microsoft support people with whom I spoke today told me I needed the product key to install Office 2013, making it seem like Microsoft thinks I both need and don't need the product key. But the Microsoft support people were unable to dig up my product key, but they said they were not the Business support team, who could help me, except that they do not work on weekends.
The best spin I can put on this is that non-business customers get low-competence support 7 days a week, and business customers get better support, but only on weekdays. But that is no excuse for the sloppy way everything is organized, with multiple overlapping systems of buying and activating that create a lot of blind alleys that waste everyone's time. The low-competence non-business support people seem to be reading from scripts, doing all sorts of things like asking you to "hold on for a brief minute or two" even though they later admitted that they were not getting any response from the business side and kept calling and calling and stringing me along as if they were doing something, and reassuring me that they would get everything working. These guys must get paid by the hour, so it is hard to consider them individually evil, but the system as designed is abusive to the customer.