What is the purpose of the Infrastructure Master FSMO role?

• A. The Infrastructure Master handles updates to cross-domain group membership and object references when objects move.
• B. The Infrastructure Master allocates unique relative IDs to domain controllers for new security principals.
• C. The Infrastructure Master manages domain naming across forest.
• D. The Infrastructure Master updates the AD schema.

Answer: (A)

Cross-domain reference consistency is what the Infrastructure Master handles. When objects move or get renamed across domains, this FSMO role updates references to those objects so cross-domain group memberships and other links remain valid. Without these updates, references stored in groups or across domains could point to objects that no longer exist in their original domain, causing access and authentication issues. The other FSMO roles oversee different duties: the RID Master assigns unique IDs to new security principals, the Domain Naming Master handles forest-wide domain creation and deletion, and the Schema Master manages updates to the AD schema.