We’re making some changes to the Direct Routing SIP interface. Starting on February 1, 2022, the Direct Routing SIP interface will only trust certificates that are signed by Certificate Authorities (CAs) that are part of the Microsoft Trusted Root Certificate Program.
How this will affect your organization
If your SBC certificate is not signed by a CA, you service may be impacted when this change takes effect. Unsupported certificates will not be accepted and you will lose PSTN connectivity via Direct Routing.
Note: Make sure that your SBC certificate is signed by a CA that is part of the program and that the Extended Key Usage (EKU) extension of your certificate includes Server Authentication.
Message ID: MC299923
Published: 24 November 2021
Updated: 24 November 2021
Plan For Change