I wanted to add an IMAP account to Office Outlook 2013 (university account) and when "Testing the account" (sending a test email) the programme keeps asking me for my credentials. No matter if I check the "remember password" box.
The above pop-up box keeps re-appearing.
Note that this is a new account in Outlook. So it is not the case that it is an account that I was already using in Outlook and that's gone haywire now. My older accounts in Outlook all work fine. (IMAP as well as POP3)