We have an issue where a few users have their own personal corporate Office 365 E3 accounts. Due to the enterprise version of Office 365 working on SharePoint for its one drive, we are unable to block this as our clients need access to their corporate accounts.
Microsoft have provide the following steps on how to block access to Office 365 but your proxy needs to be able to do HTTP header injection, Barracuda have confirmed the Web Security Gateways do not do this yet.
Can't add the link, Google, Microsoft & set up tenant restrictions
Would i be able to request this feature?