Google Chrome not letting students log into Office.com

[BassTech]

Got a weird issue with Google Chrome - All of a sudden (after xmas) Google Chrome will not let staff & students log into Office.com/Live.com. We get the error "That password is incorrect. Make sure you're using the password for your Microsoft account."

 

The email address & password is 100% correct, oddly enough it will let them sign in fine on Internet Explorer, and works with Chrome if you're signed into the domain as an admin. We haven't changed anything, all the Chrome GPOs are the same, Chrome or Windows hasn't been updated. I've checked on smoothwall and nothing is being blocked so I'm at a bit of a loss as to what's causing this. It points to a Chrome GPO but so far I haven't found anything.

 

We're using Chrome x32 v43.0.2357.132 on Windows 7 Pro x32 - RM CC4.2 network.