I have many emails to manage, 20+, and it helps greatly if I have an app that encompasses all of them in one inbox, and that's what I have got in my Apple iPhone's default mail app.
However, I want the same experience on my Windows 10 Desktop, most mail apps will only give you separate inboxes for each one.
The outlook app doesn't allow this "joint inbox" if I might say. And the Windows Mail App does support it, but then you won't be able to see each mail's inbox separately as well.