Thank you for your post!
When it comes to connecting Microsoft Defender for IoT with Microsoft Sentinel in order to send your CEF and Syslog's, you'll need to re-activate your Defender for IoT Sensors.
Tutorial: Connect Microsoft Defender for IoT with Microsoft Sentinel
Please note that you might also need to configure Sentinel to receive CEF and syslog messages. For more info.
Additional Links:
- Reactivate an OT sensor
- Cloud-connected vs. local OT sensors
- Defender for IoT Sensor onboarding and integration into Azure Sentinel
- Manage sensors with Defender for IoT in the Azure portal
I hope this helps!
If you have any other questions, please let me know. Thank you for your time and patience throughout this issue.
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