
Hi @Vinod Survase ,
The use case of turning on device onboarding is to onboard devices to Microsoft Defender for Endpoint. The benefits of onboarding the devices are so that you can monitor and protect sensitive items on a device.
Once devices are onboarded to Microsoft Defender for Endpoint, you will be able to leverage the following security features:
Endpoint behavioral sensors which collect and process behavioral signals from the operating system and send this sensor data to your cloud instance of Microsoft Defender for Endpoint.
Cloud security analytics to monitor behavior signals and translate them into insights, detections, and recommended responses to advanced threats.
Threat intelligence: to identify attacker tools, techniques, and procedures and generate alerts when observed.
If you have previously deployed Microsoft Defender for Endpoint, all the devices that were onboarded during that process will be listed in the Devices list already. In your screenshot I can see that there are no devices listed.
Additional references:
Onboard Windows devices into Microsoft 365 overview
Microsoft Defender for Endpoint
If the information helped you, please Accept the answer. This will help us as well as others in the community who may be researching similar information. Otherwise let me know if you have further questions.