The eperi Gateway transparently encrypts all Office 365 content. Authorized users may work with all data as usual. Attackers and Office 365 administrators do see encrypted “data garbage” only.
Not only Office 365-Mail is supported, but also the Office 365 functionality for websites, OneDrive and others.
The eperi Gateway acts as in-house proxy. The keys remain completely under the customer's control.
If you use the eperi Gateway, Microsoft entirely sustains the Microsoft Office 365 support.