we want to show block page to end user for url block page

[MuhammadKashif]

we are blocking youtube which is working fine and want to show block page message to end user but it is not working.

[KarstenI]

It can't work for any site that is using HTTPS. The MX would have to spoof the server certificate which is not done by default. Using Umbrella SIG is one option that comes to mind here.

[MuhammadKashif]

Thanks for your response.