Following the below email we have identified that schools using Secure Website Inspection or Individualised Filtering after the 5th of November 2015 will have problems signing into Chromebooks if no action is taken by your Web Filtering administrator .

If you are the administrator for your school you will be able to make the change described in Google’s email yourself. As an extra measure, we will be adding “accounts.gstatic.com” for schools which we have on record as using these products.

Google-admin-email