Microsoft Teams configuration

On the Microsoft side:

Configure Microsoft Teams for DirectRouting

1. Microsoft 365 admin center → Settings → Domains → Add domain (as example sbc.v-pbx.site)

2. Select method, I used verify by add TXT record in DNS

3. Receive data for verification

4. Add TXT record with data from MS

5. If you use domain only voice call, uncheck “Exchange and Exchange Online Protection” and complete verification

6. Add user with created domain. Users -> Active users -> Add a user

7. Select necessary licenses Phone Standart + (Buisness Basic or if you have E3)

8. Now you need go to “Microsoft Teams admin center” Voice -> Direct Routing

9. At the top right of the page, select “Manage PSTN usage records” and add “sbc”

10. Next Voice -> Direct Routing ->SBCs -> Add

make sure you have selected “Enabled” and “Send SIP options”

11. You will see that the domain has been added but is inactive.

12. Next Voice -> Direct Routing -> Voice routes -> Add

Add regular expression to “Dialed number pattern” ^(\+[0-9]{7,15})$. Add SBC and Add PSTN that we created

13. Next Voice -> Voice routing policies->Add

Create new Policy and add our PSTN

14. Users -> Manage users and edit our user

15. Policies->Voice routing policy-> Edit

Select created “my rp”

16. Account -> General information -> Edit

17. Assign phone number -> Phone number type=Direct routing -> Assigned phone number = your number

Congratulations, the MS Teams configuration is complete! Once we configure Asterisk as the SBC, it will go into an active mode. Users will then be able to make and receive calls.