Cannot set up Outlook in Windows 11 to work with Totalise email

[#1]

I've bought a new pc with windows 11.  I cannot get the outlook to connect to the totalise server.  Ive tried the recommended setting, I've gone through all the settings I can find in the forum, but keep getting the same message back. I may need an app password.  Any further suggestion?

{"SessionId":"bff37b54-4f52-2a47-a72a-1ac6f26fc842","Timestamp":1760380212820,"Error":"INVALIDCREDENTIALS INTERACTIONREQUIRED"}

[#2]

To save someone else asking, Is this "Outlook" as supplied with windows 11 (sometimes referred to as "new Outlook")  or "Outlook (classic)" as part of a Microsoft 365 account?

[#3]

This is "outllok" as supplied with windows 11.  While I do have a 365 account I cannot find a way to download classic, it looks like it has been discontinued.

[#4]

I set up a new Windows 11 PC within the last couple of months.

Installed Microsoft 365.

When I pressed the windows key and started to type Outlook, two options appeared "Outlook" and "Outlook (classic)" I chose to open the latter.

It may also be worth looking under settings > Apps >Installed Apps (which in my case seems to have Outlook for windows listed. and  settings > Apps >Default Apps which has both  "Outlook" and "Outlook (classic)" listed

[#5]

Outlook classic has not been discontinued.

Are you setting the server details manually?  Use the server connection diagnostics to find the correct settings and validate them.

[#6 · Accepted solution]

A Google search suggests that Outlook Classic has been dropped from some 365 installations, but is still available.

For example, see: https://office-watch.com/2025/outlook-classic-dropped-from-microsoft-365/.

[#7]

Thank you everyone for your suggestions.  Thank you Baldrick1 for the link.  It worked straight away.