Hello @BI Team We are sorry to hear you're facing this issue. is this your first time getting the 4000 error? has anything changed in your regulatory documentation after it got approved
Here are some things you can try to troubleshoot and fix Error 4000 SMS delivery failures with Azure Communication Services:
- Ensure you aren't exceeding the maximum number of messages allowed for your number as stated in this Azure doc.
- Try requesting a service quota increase for SMS so you can send more messages before hitting fraud detection thresholds.
- Double check that your regulatory documentation is up-to-date and accurately reflects your business operations. Update it if needed.
- Verify that the phone numbers you are sending SMS to are valid, opt-in numbers that expect to receive messages from you. Sending to invalid or spam-trap numbers can trigger fraud detection.
Hope that helps.
-Grace