Issues Accessing Office 365 from Firefox for Mac

Mac users who access Microsoft Office 365 from the web ( using the Firefox web browser are currently unable to do so from the latest version of the browser, Firefox 30, due to stricter security controls in this version that fail to negotiate typical network protocols.

Users attempting to access from Firefox 30 receive a message that reads “401 – Unauthorized: Access is denied due to invalid credentials.” This issue does not impact Windows users who use Firefox to access Office 365.

ITS suggests that Mac users use either the Safari or Chrome web browser until this issue has been resolved.