What is the Schema Master FSMO role?

• A. The Schema Master updates the AD schema; changes to schema are propagated through the forest.
• B. The Schema Master assigns SIDs to new users.
• C. The Schema Master handles time synchronization across the domain.
• D. The Schema Master manages domain trusts.

Answer: (A)

The Schema Master is the FSMO role responsible for updating the Active Directory schema. The schema defines all object types and attributes in the directory and is shared across the entire forest. Only one Schema Master exists in the forest, and when a schema change is made (such as adding a new attribute or class), that change is performed on the Schema Master and then replicated to all domain controllers so the whole forest enforces the same schema.

This role does not assign SIDs to new users (that’s the RID Master’s job), nor does it manage time synchronization (that’s handled by the PDC Emulator), nor domain trusts (that forest-wide naming and trust management is handled by the Domain Naming Master).