Câu 61: MS-721: Collaboration Communications Systems Engineer

You have a Microsoft Teams Phone deployment. You are deploying Direct Routing. All users have a SIP URI in the format of [email protected]. The Session Border Controller (SBC) is named sbc.voice.contoso.com. When troubleshooting errors on the SBC, you receive the warning shown in the following exhibit. What is a possible cause of the issue?

1. A. The tenant is missing a vanity domain ofvoice.contoso.com. — đáp án hiện tại
2. B. The firewall blocks inbound traffic on port 443 to the SBC.
3. C. Microsoft 365 Phone System licenses are not assigned to the users.
4. D. The certificate does not match the FQDN of the SBC.