Which Microsoft 365 admin center tool can you use to test and verify the connectivity between Teams Phone and a Session Border Controller (SBC)?

Teams admin center – Direct Routing dashboard

Teams admin center – SBC diagnostic tool

PowerShell – Get-CsOnlinePSTNGateway

Microsoft 365 admin center – Health dashboard

A company has an SBC that is configured for Direct Routing. They are experiencing issues where calls are not connecting. The SBC logs show '403 Forbidden' responses from Teams. The SBC's certificate is valid. What is the most likely cause?

The SBC's SIP port is set to 5060.

The voice routing policy is not assigned to the user.

The SBC's media port is blocked.

The SBC's FQDN does not match the PSTN gateway's FQDN.

Your SBC is configured for Direct Routing, but you are concerned about unauthorized devices sending SIP traffic to the SBC. What is the recommended way to secure the SBC against unsolicited SIP traffic?

Disable the SBC's SIP port to prevent external access.

Set a shared secret on the SBC that must be included in every SIP message.

Configure the SBC's firewall to accept SIP traffic only from Microsoft 365 IP ranges.

Use a SIP ALG to filter SIP messages based on user-agent strings.

After configuring Direct Routing, an administrator runs the 'Get-CsOnlinePSTNGateway' cmdlet and sees the gateway listed. They also run 'Test-CsDirectRouting' and it fails. What is the most likely cause?

The SBC's media port is blocked.

The voice routing policy is not assigned to the test user.

The PSTN gateway is not enabled for calls.

The SBC is not reachable from the Teams Phone service.

Microsoft 365 Certified:Collaboration Communications Systems Engineer Associate

Domain 3Objective 6

Configure and Manage Direct Routing for Teams Phone MS-721 Practice Questions (Page 7)

Part of the Implement and configure Teams Phone domain, which accounts for 30–35% of the MS-721 exam. Microsoft does not publish an official question count, but from its 100-minute exam (~40–65 total, ~12–23 in this domain), expect 2–4 from this objective — we provide 34 practice questions to prepare you well beyond it. (estimate)

34questions here

7free pages

6concepts

30–35%of the exam

Questions 31–34

31foundation · easy
Which Microsoft 365 admin center tool can you use to test and verify the connectivity between Teams Phone and a Session Border Controller (SBC)?
Select an answer first
32expert · hard
A company has an SBC that is configured for Direct Routing. They are experiencing issues where calls are not connecting. The SBC logs show '403 Forbidden' responses from Teams. The SBC's certificate is valid. What is the most likely cause?
Select an answer first
33application · medium
Your SBC is configured for Direct Routing, but you are concerned about unauthorized devices sending SIP traffic to the SBC. What is the recommended way to secure the SBC against unsolicited SIP traffic?
Select an answer first
34application · medium
After configuring Direct Routing, an administrator runs the 'Get-CsOnlinePSTNGateway' cmdlet and sees the gateway listed. They also run 'Test-CsDirectRouting' and it fails. What is the most likely cause?
Select an answer first

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