A department has eleven subscriptions today and adds a few more each quarter. A rule that only approved regions may be used has to apply to all of them, including subscriptions that do not exist yet, without anyone remembering to repeat the setup. Where do you assign it?
Microsoft Certified: Azure Fundamentals (AZ-900), objective architecture-and-services. Azure architecture and services medium
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The options
Correct At a management group containing those subscriptions
Correct. Assignments made at a management group are inherited by every subscription beneath it, including subscriptions moved in or created later, which is precisely the 'and the ones that do not exist yet' requirement.
Not correct Separately in each of the eleven subscriptions
Wrong. It is correct today and wrong the moment somebody creates the twelfth subscription and forgets, which is the failure the requirement was written to prevent.
Not correct On each resource group
Wrong, and worse than assigning per subscription: more places to remember, and an assignment on today's resource groups cannot govern one created tomorrow.
Not correct As a resource lock on each subscription
Wrong. Locks prevent deletion or modification of existing resources. They have no vocabulary for expressing which regions are permitted.
Why
Governance flows downhill: policy assignments and role assignments made at a management group apply to the subscriptions under it, then to their resource groups, then to their resources. Every management group and every subscription has exactly one parent, so the hierarchy is a tree and inheritance is unambiguous. The working rule is to assign at the highest scope where the statement is still true, and let inheritance do the repetition for you.
Where this comes from
- Cited
- Microsoft AZ-900 study guide skill area architecture-and-services.core-architectural-components
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