Identify the Operations Master Role of Schema Master
To manually update the Active Directory schema, you must first identify the domain controller in your Active Directory forest that owns the operations master role (also known as flexible single master operation or FSMO) of schema master. This domain controller is the only server in the forest that can process updates to the Active Directory schema. After the schema update completes, the update replicates from the schema master to all other domain controllers in your Active Directory forest.
The following procedure describes how to determine which domain controller in your Active Directory forest currently holds operations master role of schema master.
Note For more information about operations master roles, see Q234790, "How to Find FSMO Role Holders (Servers)," and Q197132, "Windows 2000 Active Directory FSMO Roles," in the Microsoft Knowledge Base.
To identify the schema master computer
Note If Active Directory Schema is not visible, you may have to register the Schmmgmt.dll file. To register the file: