I added my work email(On Exchange 2016) to Office 365 Outlook and it keeps prompting me for my password. I have tried my email password, my Microsoft account password and i have tried signing in with my office 365 account login and nothing works. If i close the box and click on the Need Password at the bottom of outlook it will connect me back to Exchange without needing my password. It is hard to do much in outlook without it popping um multiple times.
Image of prompt here https://afa.net/media/480883/annotation-2020-07-16-092933.png