Using classic Outlook for Windows in business environments
I overcame the opening screen login prompt by adding an e-mail account not previously setup in outlook. From here I was able to view that my IMAP account required password attention. I re-entered the password, which erred. Turned out that the character I thought was a "1", should've been an "l." So, my bad, wrong password. Thought that sharing my flub & alternate resolution might help others resolve their issue to get past the initiation screen.