Using Classic Outlook on Windows for personal email, calendar, and contact management
Could this be connected to the Office account in some way? I am having the same problem and when I select "Office Account" from the File menu and click on "Sign In", I get an error dialog saying "Sorry, we are having some temporary server issues". There is no problem with my connection. As with the OP, when I click on the button in the banner it takes me to the MSN web page.