Managing personal Outlook.com account settings, security, and privacy
I have been having this problem for over a week now (today is 7-26-2016). It appears that problems similar to this have happened for years. With me, it started in Chrome. I cleared the cache. I have scanned the computer (several times with different products). It worked in Chrome on a different computer and on my ipad app. I was able to open Outlook in Opera web browser - it worked for 5 days. Now it has the same message. I AM able to log in to the One Drive (so far). I now have Outlook open in Edge. But how long is that going to work? I don't generally use Edge/Explorer. (It is really clunky now).
I don't look forward to it - but my only answer might be to change to a different email system.
Would appreciate figuring out what is going on.