Hi @Craig Garland , thanks for the question.
- Adaptive Application Control does not enforce application whitelisting on your on-premises servers. It provides security alerts if any application runs other than the ones you've defined as safe.
- To confirm the license applied to each server, you can check your Azure subscription and the associated licenses.
- You need Microsoft Defender for Servers Plan 2 to enable Adaptive Application Control on your on-premises servers.
Please note that Defender for Cloud needs at least two weeks of data to define unique recommendations per group of machines. Machines that have recently been created or belong to subscriptions that were only recently protected by Microsoft Defender for Servers will appear under the "No recommendation" tab
In summary, Adaptive Application Control can help you create application whitelisting for your on-premises servers, but it does not enforce it. You need Microsoft Defender for Servers Plan 2 to enable this feature.
Please let me know if you have any questions and I can help you further.
If this answer helps you please mark "Accept Answer" so other users can reference it.
Thank you,
James