How to add the 'All Accounts Inbox' in Outlook for Windows 11

Wow.... I'm also trying to find an easy way to do this.

The Outlook app on my iPhone and iPad has All Accounts, which shows all emails from all 7 of my accounts (2 of them being Gmail addresses). It's perfect in every way. Simple to use, and everything is easy to find.

I have Outlook 2021 (as part of Office 2021), and there seems to be no easy way to do it. I've Googled the hell out of how to have a Unified Inbox. It seems I have to merge accounts, or create rules, or run a VB script to make it possible. That's a lil difficult for the average user.

The "new" Outlook app for Windows which apparently will replace the Windows Mail app in 2024 doesn't seem to have the functionality either.

The current Windows Mail app doesn't have the a Global Unified Inbox, but at least it's simplified, in that it shows each of the Accounts up top in the left pane, and Folders below in the same left pane. That's still usable for me.

Whereas, the "new" Outlook app is much like the Outlook you get with Office 2021/2023/365, it just shows all the accounts, and you have to click the > to expand the folders within that account, and it becomes a massive pain in the rear if you've expanded all of your email accounts, you then have a lot of scrolling to do with your mouse or cursor keys to find/move items.

Not only that, but the "new" Outlook Windows app includes advertisement messages, the background image is gone, a lot of the functionality is gone, and rather than clicking on an email account and seeing all folders, it's a collapsible set of folders. It looks ugly, feels clunky, and quite frankly, is a pain in the rear to use.

Why can't they make something simple to use with one Global Unified Inbox as an option for the Outlook app and Outlook 2021/2023/365 like it is on the iOS version of Outlook???

It looks like Microsoft posted about the benefits of doing just this last month (https://www.microsoft.com/en-us/microsoft-365-life-hacks/organization/three-benefits-unified-inbox) but they neglect to show how one could go about doing it.

The silence from the Outlook team at Microsoft for say...the last 10 years on this subject is deafening. How iOS and MacOS have this functionality and Windows does not is nothing less than insanity.

And if that's the case...why?

I think there must be a misinterpretation on the part of Microsoft as to what the problem is. I say this because there is absolutely no possible way that they came out with a version of Outlook that does not have the ability to consolidate multiple email accounts into a single, unified view. The product simply would not get past even the most basic of review stages, and certainly would not qualify for alpha, let alone beta or production status. Thus, the capability must be within the tool somewhere. Imagine having to use a different TV for every TV station you wanted to watch. Sounds silly, doesn't it?

So, I will ask the question more clearly in hopes that it was simply not understood:

What are the steps to take in Outlook so that ALL emails, regardless of the email address sent-to, appear in a single, consolidated view?