Yes, you can onboard non-Azure servers, including those hosted on Google Cloud and AWS, to Microsoft Defender for Endpoint. This does not necessarily require Azure Arc.
Here are the general steps to do this:
- Download the onboarding package from the Microsoft Defender Security Center.
- Extract the package to get the setup file and scripts.
- Run the setup on the servers you want to onboard.
Here is a guide : https://video2.skills-academy.com/en-us/azure/defender-for-cloud/onboard-machines-with-defender-for-endpoint
You can also leverage the connectors as below:
GCP- https://video2.skills-academy.com/en-us/azure/defender-for-cloud/quickstart-onboard-gcp
AWS -https://video2.skills-academy.com/en-us/azure/defender-for-cloud/quickstart-onboard-aws