Selectively removing cookies to resolve Office 365 authentication issues

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…

2 Comments

  • Tuesday 2 September 2014 - 2:26 | Permalink


    I had deleted as many MS cookies as I could think of, but missed microsoftonline.com. This worked for me on a Mac running Mavericks and Chrome 37.0.2062.94. Thanks! Ben

  • Thursday 4 September 2014 - 16:24 | Permalink


    Glad it helped you out Ben!

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