Office365 broken again as of this morning

Exchange access was working for many months.  Suddenly this morning it is broken accessing my Office365 account.  I am able to access using Outlook itself without changing a thing, but emClient simply stopped working.

Nothing at all is shown in the emClient logs.

As a Pro License user, it might be better for you to open a support ticket with eM Client.

Otherwise, if you want to continue here, go to Menu > Tools > Operations, and look for an error in the Log tab. Also, please give the eM Client version you are using.