Cannot create an imap account in Outlook 2016

[trugge]

Hi,


I am running Windows 10 (latest updates) and Outlook 2016 (Office 365)
I have 3 imap accounts already, and wanting the fourth I bump into problems.

Outlook will not log on to the mail server.
I have tried more than 10 times meticulously to enter all information correctly.

Using same user id and pw works fine using webmail
Creating the same account on my Android phone with Outlook works fine.

Anyone with good ideas what to further check?

Kind regards
Torben