Your network contains an Active Directory forest. The forest schema contains a custom attribute for user
objects.
You need to modify the custom attribute value of 500 user accounts.
Which tool should you use?

A.
Csvde

B.
Dsmod

C.
Dsrm

D.
Ldifde

Explanation:
We cannot use Dsmodhere, because it supports only a subset of commonly used object class attributes.
Csvdecan only import and export data.
Dsrmis used to delete objects from the directory.
Reference:
http://technet.microsoft.com/en-us/library/cc731033.aspx
Ldifde
Creates, modifies, and deletes directory objects.