New Outlook for Windows locked me out

[Timmmy]

Hi world

About a week ago I've updated to the 'New Outlook' and it worked great but the regret hit me yesterday as I'm no longer able to use my emails in Outlook. I was creating a mail and at the moment of clicking 'Send', I was kicked out. It was asking for my IMAP password again. As you'll see below, I am unable to select 'Secure connection type', the drop-down box is just empty and clicking it just highlights the box.

When filling in all settings, I instantly get 'Sign in failed', it doesn't even seem to try to make any connection.

The troubleshooting details generated the following:

{"SessionId":"f6a0dfe9-ef21-420a-aff2-60c643f3va00","Timestamp":1697694567618}

It also states to contact my administrator but I am the administrator.

Clicking on 'Troubleshoot for me' brings me back to the 'Welcome to the new Outlook' page where I can select my account again but when I then click 'Continue', it states 'This email account has already been added.'.

What's worse is that I do not seem to have the ability to return to the "Old" Outlook 2021! Why does Microsoft always have to make things so horrible? Please advise.

[#2 · Accepted solution]

Whew, solved it!
I had to create a new account because the welcome page wouldn't let me log into any other account (!), so I've created one (email address removed for privacy reasons, considering how I feel about the company right now). Then I got the button back to return to the old Outlook, and rectified settings there – I had recently changed my password. Then I could jump back to the new Outlook to recover the mail I was sending.
Why does it even keep the original icon? Both of them open the new Outlook anyway:

[#3]

>>
Why does it even keep the original icon? Both of them open the new Outlook anyway:
>>
They change the icons so they always open new Outlook when it is enabled.

If the Outlook icon (not 'New") opens the new outlook, unpin it then open Outlook and re-pin.

[#4]

@Diane_Poremsky_MVP Even when I launch it from the Start menu, it just opens the 'New' Outlook. It's a shame the Outlook team didn't add a failsafe to switch to the 'old' version. I also tested Shift/Ctrl/Alt + launching Outlook but that didn't do a thing. Well, except for launching Outlook 🙃

[#5]

Have you tried the steps in this article?
https://support.microsoft.com/office/toggling-out-of-the-new-outlook-for-windows-preview-ec102b39-57...

The new Outlook is a work in progress - you can leave Feedback at
https://feedbackportal.microsoft.com/feedback/forum/89a8afa3-2e1c-ec11-b6e7-0022481f8472

[#6]

Yeah, I guess I could've just done a regedit but then I wouldn't have such colourful email address. The switch is unreachable in the aforementioned state, that would've been too user friendly. lol @ the mod that edited the address out for "privacy reasons", while it's clearly a dud account, without notifying me whatsoever and without any mod edit clarification on the post.
Thank you for the feedback link, Diane, that's most helpful.