Microsoft model for a scalable Cloud Adtoption is based on the Enterprise Scale Architecture and I think this is a scalable and useful modell for every customer that uses Azure ressources. It´s based on the definition to granulary devide the workloads in different subscriptions and gives via Management Groups the possibility to group this differnent subscription into workload groups like Development, Core, etc. I know many customers struggle with this model and mistakenly think that Enterprise Scale is a reference to Enterprise customers, but this is not the case.

Based on the Enterprise Scale Architecture some services and security features can only be activated on subscription level to guarante that each resource inside the subscription is secured. This basis makes it even more important for customers to consider the Enterprise Scale Architecture or to orient themselves towards it.

The Microsoft Defender for Cloud and especially the Defender for Server P1 and P2 plans can only be activated on subscription level in the past. Microsoft has decided to change this and now allow plans to be activated at resource level (per server). It is important to understand that the principled approach activating on Subscription Level and the Enterprise Scale architecture are still valid and needed and this possibility is only a concession to cover certain requirements:

• manage security configurations at a lower hierarchy level
• flexibility for excluding specific resources (VMs) inside the subscription
• enable different plans on subscription because for implementation of Enterprise Scale approach