MS-740 Teams Calling and PSTN Troubleshooting 1 — Questions and Answers
Question 1: A user with a Calling Plan cannot make outbound calls. Which Teams admin center section should you check first?
- Phone numbers assigned to the user (Correct answer)
- Teams calling policy
- Direct Routing SBC health
- Conference bridge settings
Correct answer: Phone numbers assigned to the user
Outbound calling issues often stem from a phone number not being properly assigned to the user in the Teams admin center.
Question 2: Which PowerShell cmdlet assigns a phone number to a Teams user?
- Set-CsPhoneNumberAssignment (Correct answer)
- Grant-CsVoicePolicy
- Set-CsUser -LineURI
- New-CsVoiceRoute
Correct answer: Set-CsPhoneNumberAssignment
Set-CsPhoneNumberAssignment is the modern cmdlet used to assign phone numbers to Teams users in the unified Microsoft 365 model.
Question 3: A Direct Routing SBC shows as inactive in the Teams admin center. What should you check first?
- TLS certificate validity on the SBC (Correct answer)
- SIP trunk configuration
- Teams Phone license on users
- DNS A record for the SBC FQDN
Correct answer: TLS certificate validity on the SBC
SBC inactivity is most commonly caused by an expired or invalid TLS certificate, which prevents Microsoft from establishing a secure SIP connection.
Question 4: Which SIP response code indicates 'User Not Found' in Direct Routing call logs?
- 404 (Correct answer)
- 403
- 503
- 408
Correct answer: 404
A SIP 404 response means the user or resource was not found, commonly seen in Direct Routing when a number is unassigned.
Question 5: A user receives calls but cannot transfer them. Which policy should you review?
- Teams calling policy (AllowCallForwardingToUser) (Correct answer)
- Voice routing policy
- Dial plan normalization rule
- Audio conferencing policy
Correct answer: Teams calling policy (AllowCallForwardingToUser)
The AllowCallForwardingToUser setting in the Teams calling policy controls whether a user can transfer calls to other users.
Question 6: What does the 'No route found' error in Direct Routing call diagnostics indicate?
- No voice routing policy matches the dialed number (Correct answer)
- SBC is offline
- User lacks a Teams Phone license
- Dial plan normalization failed
Correct answer: No voice routing policy matches the dialed number
'No route found' means no voice route in the user's assigned voice routing policy matches the normalized number they dialed.
MS-740 Teams Calling and PSTN Troubleshooting 1
A user with a Calling Plan cannot make outbound calls.
Which Teams admin center section should you check first?