Final answer:
To encrypt communication from Azure web apps to client browsers, SSL/TLS must be configured in the Azure Web App.
Step-by-step explanation:
To encrypt communication from Azure web apps to client browsers, you need to configure SSL/TLS (Secure Sockets Layer/Transport Layer Security) in the Azure Web App. SSL/TLS is a cryptographic protocol that provides secure communication by encrypting data sent between the server and the client. By configuring SSL/TLS, the web app will use HTTPS instead of HTTP, ensuring that data transmitted between the web app and the client browsers is encrypted and secure.