How do I fix email bounce backs when using the Graph API to create an event?

Question

Good day,

I keep getting the following error when making a successful call to the events endpoint on the Graph API: Remote server returned '550 5.7.708 Service unavailable. Access denied, traffic not accepted from this IP. How do I resolve this?

Answer 1

Hi @colinYou might already find this NDR (Non-Delivery Report) documentation that might be helpful for the issue you are facing.

550 5.7.708 NDR exception, which is more likely to affect new customers especially those with a Microsoft 365 trial subscription and using the Microsoft Graph API.

The issue should be resolved once you purchase a paid license. Alternatively, if you're an email admin, consider reaching out to Microsoft Support to request temporary release until you assign Exchange Online licenses.