Using classic Outlook for Windows in business environments
Don't shoot the messenger here because I think this is a bad user experience, but it seems Microsoft wants you to use Favorites for this purpose. My assumption is that if you have multiple accounts, Microsoft expects you to add each inbox to your favorites (as well as any additional folders you deem important). Favorites can then be ordered in any way you see fit. Again, I don't agree with this. I'm a consultant, so my journey is usually to work inside my firm account first, then each of my client account inboxes, then my personal inboxes. If this is the direction Microsoft is going, then I guess it will just be about getting used to it.