
To integrate an HTTPS application that doesn’t support iframes with the new Outlook web add-ins or app, you’ll need to adapt your integration strategy. Since your application blocks iframes, the integration approach should focus on using the available methods to bypass or work around iframe limitations. Message Extensions allow users to interact with your app directly from the compose area in Outlook, without using iframes. Instead of embedding your application, you can provide users with a way to interact with your application through messages or commands. For scenarios where iframes are not feasible, using a web-based dialog might be an option. While direct iframe usage is blocked, consider using the showAsDialog
method in your add-in to open a new window or a dialog that interacts with your application.