Every now and again, Office 365 decides that it doesn’t recognise my credentials and won’t let me log on. Well, not from a my normal web browser anyway. Everything works on my iDevices, my Windows Phone, even in a a protected browser session (e.g. Google Chrome’s incognito browsing), but not from my “normal” browser, with handy password management extension…

Because it works in a protected browser session, I was pretty sure the problem is related to cookies but removing them all is a bit of a sledgehammer to crack a nut.  Instead, I delete individual cookies by going to chrome://settings/cookies and search for the microsoftonline.com cookies.  After removing these, I can log on successfully for a few weeks until the next time Office 365 decides it can’t authenticate me…