Hello!
In general, Microsoft Defender for Cloud (MDC) includes Microsoft Defender for Servers (MDS). Defender for Servers leverages Microsoft Defender for Endpoint (MDE) for its server protection piece, but on top of that, it adds capabilities to Server Monitoring, Access Management, Network Hardening, etc.
If you use the Defender for Server (Defender for Cloud) in Azure, Defender (MDE.Windows/Linux Extension) will install itself automatically on all servers in your subscription. It is called automatic provisioning. You can check this setting via these steps: Microsoft Azure => Microsoft Defender for Cloud => Environment settings => <your subscription> => Defender plans => on the Servers tab choose under Monitoring coverage Settings button => Endpoint protection must be turned on.
If you don't use Defender for Server (Defender for Cloud), then go to https://security.microsoft.com/ and follow these steps: Settings => Endpoints => Device management => Onboarding => select OS, download the script, run it and wait up to 12-24 hours, when you can see MDE.Windows/Linux extension installed on the server.
I recommend this article which explains the difference between these two services:
https://medium.com/microsoftazure/microsoft-defender-endpoint-microsoft-defender-for-cloud-for-servers-53c95d8c8d92
You can also check out the Defender for Servers Plan features:
Note: You must choose a server management model: Defender for Server (Defender for Cloud) or Defender for Endpoint. Because there are different tariffs for services. Defender for Cloud has pay-as-you-go model, but Defender for Endpoint has a model with licenses.
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