MS-740 Teams Calling and PSTN Troubleshooting

Question 1

A user with a Calling Plan cannot make outbound calls. Which Teams admin center section should you check first?

Accepted Answer

Phone numbers assigned to the user

Answer

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?

Accepted Answer

Set-CsPhoneNumberAssignment

Answer

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?

Accepted Answer

TLS certificate validity on the SBC

Answer

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?

Accepted Answer

404

Answer

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?

Accepted Answer

Teams calling policy (AllowCallForwardingToUser)

Answer

The AllowCallForwardingToUser setting in the Teams calling policy controls whether a user can transfer calls to other users.

MS-740 - Troubleshooting Microsoft Teams Practice Test