I did look at that and it didn't help. None of the issues in the FAQ applied to my situation. I only have one Microsoft account and I can log into Microsoft.com just fine with that account. Not the Mojang site.

To clarify what's happening. When I try to log into Minecraft or the Mojang site, I get the message of "Invalid Password" even though I'm using the same one I use to log into the Microsoft site.

Someone else solved my problem. You have to click "go back" in Minecraft to select to use your Microsoft Account to log in. That's not documented anywhere in your instructions. Update!