Looking for "all mailboxes" in new outlook interface

Please just reinstate "Mail". Give users the choice

I can't believe this is not available in the new version. I thought this was a joke and I was just missing some settings. Then I did a Google search and found over 100 angry replies from people. This is crazy; this was such a streamlined, basic feature from the old Outlook. If you have 10 email accounts from different points in your business, like an info, support, feedback, and other email accounts, and you want to do a simple search for a message you saw from a customer, you can't do this anymore. You have to go through mailbox by mailbox, duplicating the amount of work and time it takes. I honestly, at this point, don't know why anyone would ever be using the new Outlook. There are so many missing features; I think it's about four years of development behind. This reminds me of when Microsoft bought Skype and completely destroyed it. Everyone I knew who was using Skype before had to stop using it, and then five years later, all of the features of the old version are back, but now all the users are gone. I actually feel embarrassed to use Skype if I log back in. This is exactly what they're doing with Outlook, but I think they learned a little bit about what happened after they desecrated Skype, so they're leaving the old Outlook functional for another few years.

Literally logged in just to add a reply here because this is outrageous. Having the ability to search a mail in all of my accounts has been 40% of the reason I even am on the Microsoft ecosystem and have Office. What the duck. Stop listening to whoever is making these calls and start listening to the userbase... they're the ones making your money not investors.

Why not reinstate "Mail" and give users a choice. Recoup the cost by dismissing or demoting the arrogant incompetents who ruined a perfectly good system and ignored those of us who complained. If it aint broke don't fix it.

The lack of a simple and intuitive search across all mailboxes/accounts is silly, unserious, and when struggling to search across various accounts for something important, enraging.

How is this the cutting edge?