New Outlook Layout - How do I add more columns (Size of Mail) to the inbox?

Fortunately I've not had that issue and have been able to toggle between versions without any problem.

... I hope we can carry on using the old version until I retire!!

Good luck with that!

As you can see from my earlier Post (Nov. 13) I 'switched back' to the 'old' Outlook desktop app - using the toggle switch - and now nearly all my incoming emails are treated as Junk!

As for the compatibility between the desktop app, web interface (outlook.com) and Android app versions, it is laughable!

I came here looking for a solution and its clear there isn't one. Managing the large volume of emails I receive is criticial to my efficiency at work, losing this functionality is major problem for me.

I hope we can carry on using the old version until I retire!!

[Outlook for Windows Desktop] The inability to add columns was the final straw for me; I'm going back to the old Outlook. The column I needed is the "sender email" column, which allows you to easily spot most of the phishing and spoofed emails for easy deletion (it shows the actual email address, not the sender name). Not having that available is a deal killer. Add to that the extremely limited adjustment that can be made to the ribbon, and the loss of the Quick Access toolbar, and the new offering is so bad that if they discontinue the old outlook, I'll have to look for an entirely new email client.

I hope you have better luck switching back from the 'New' Outlook to the Classic version (desktop app). Since I did it, 99% of my incoming emails - including from long-term, established Sender's such as Microsoft Community - are now sent to Junk!!!