Websites look wrong or appear differently than they should when using the Email Threat Isolation service.
End users may experience certain limitations when a website is isolated.
The isolation platform would not render correctly sites that have/use:
Java applets.
Silverlight and sites that require only IE browsers.
Flash as it is disabled by default.
Note that the Email Threat Isolation service supports the following browsers: IE, Edge, Chrome, Chromium, Firefox, and Safari.