Exam AZ-800 topic 1 question 49 discussion

https://learn.microsoft.com/en-us/troubleshoot/windows-server/active-directory/fsmo-roles#domain-naming-master-fsmo-role

This question is valid Exam date - 27-07-2024

If you’re having trouble removing custom storage used for an app on your domain, you might want to check the server holding the Infrastructure Master FSMO role. The Infrastructure Master is responsible for updating references from objects in its domain to objects in other domains1. It’s also responsible for removing an object from its domain and putting it in another domain during an object move

C Domain Naming Master - Must be online when domains and application partitions in a forest are added or removed. https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/fsmo-placement-and-optimization-on-ad-dcs#more-information

To remove a custom application partition, the domain controller that plays the role of schema master must be available. Therefore, if the removal process is failing, it is likely that DC1, which is the schema master, is unavailable. I recommend checking the status of the DC1 and making sure it is online and working properly. If DC1 is inaccessible, you need to resolve this issue before you can remove the custom application partition.

Why not option A?

The domain naming master FSMO role holder is the DC responsible for making changes to the forest-wide domain name space of the directory, that is, the Partitions\Configuration naming context or LDAP://CN=Partitions, CN=Configuration, DC=<domain>. This DC is the only one that can add or remove a domain from the directory. It can also add or remove cross references to domains in external directories. https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/fsmo-roles#domain%20naming

C is the correct answer.