# Failed to Configure Event Notification

#### Question

When configuring event notification on OBS, the user is prompted by the message "OBS is not authorized to use this topic. Go to SMN to authorize OBS to use this topic."

#### Answer

Go to the SMN console. On the Configure Topic Policy page, select OBS under Services that can publish messages to this topic.

For details about how to use the SMN service, see "Topic Policy" in the SMN User Guide.

Parent topic: Troubleshooting