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MicrosoftAlexliard -- The only scenario that changes with this feature is the incoming request starting from the front-end to the workers. In the past, front ends terminate all SSL connections and then forwards the request to the workers. The only thing that changes now is that the request from front-end going to workers will be encrypted. It doesn't affect any of your outbound calls, nor will it affect how you handle any incoming calls.
Joe_M205 -- We'll establish a new HTTPS connection between our front-end and workers. However, if you're using client certs for incoming requests, nothing changes in that regard; we'll still forward the cert to you in the header. Refer to this doc: Configure TLS mutual authentication - Azure App Service | Microsoft Learn