HTTPS (HTTP Secure) is a protocol that encrypts the communication between a web server and a web browser to ensure that the data transmitted is secure and can't be intercepted by third parties. When you secure your website with an Azure certificate, it means that the communication between the web server and web browser is encrypted.
However, the certificate only encrypts the communication between the web server and web browser, and it does not encrypt the files that users upload to their profile. If you want to encrypt the files that users upload to their profiles, you will need to implement additional security measures such as server-side encryption or client-side encryption.