Absolute Free MS-721 Exam Practice for Comprehensive Preparation 

You have a Microsoft 365 tenant that has Modern authentication enabled for an services Multi-factor authentication (MFA) is enforced for all users. You are deploying Microsoft Teams Rooms. The first time you attempt to sign in to a Teams Rooms, you receive an error message indicating that the device cannot sign in to Teams. You verify that Modern authentication is enabled in Teams Rooms. What prevents you from signing in?

You are deploying Direct Routing.

All users have a SIP URI in the format of user@contoso.com. 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?