Persistent error message "Outlook cannot connect to the Exchange server"

[JesperWie]

I run Outlook for Mac as part of an Office 365 subscription. I have a couple of email accounts associated with my Outlook. As of today, I get the above error message every 10 or so seconds. I have not changed any settings, passwords, account info etc. Internet access is fine and reliable; all email passwords are current.

Any hot tips from anyone? (NB - i'm NOT very IT literate, so tips in layman language particularly welcome!)

Thank, Jesper

[#2]

@JesperWie 
Hey! This might be related to security changes in one or several accounts. I would start with removing all accounts and re-add them one by one, have you tried that?