Your network contains an Active Directory forest.
The forest contains one domainnamed contoso.com.
You attempt to create a new child domainand you receive the following error message:
“An LDAP read of operational attributes failed.”
You need to ensure that you can add a new child domain to the forest.
What should you do?

A.
Move the PDC emulator role.

B.
Move the RID master role.

C.
Move the infrastructure master role.

D.
Move the schema master role.

E.
Move the domain naming master role.

F.
Move the global catalog server.

G.
Move the bridgehead server.

H.
Install a read-only domain controller (RODC).

I.
Deploy an additional global catalog server.

J.
Restart the Active Directory Domain Services (AD DS) service.

Explanation:
This message appears when the domain naming master is unavailable. It needs to be moved to another
domain controller to resolve this.
Reference:
http://technet.microsoft.com/en-us/library/bb727058.aspx
Troubleshooting Active Directory Installation Wizard Problems
Symptom or Error
An LDAP read of operational attributes failed.
Root Cause
The domain naming master for the forest is offline or cannot be contacted.
Solution
Make the current domain naming master accessible. If necessary, see “Seizing Operations Master Roles” in
this guide.