You create 200 new user accounts. The users are located in six different sites. New users
report that they receive the following error message when they try to log on: “The username
or password is incorrect.” You confirm that the user accounts exist and are enabled. You
also confirm that the user name and password information supplied are correct.
You need to identify the cause of the failure. You also need to ensure that the new users are
able to log on.
Which utility should you run?

A.
Active Directory Domains and Trusts

B.
Repadmin

C.
Rstools

D.
Rsdiag

Explanation:
Repadmin allows us to check the replication status and also allows us to force a replication
between domain controllers.

http://technet.microsoft.com/en-us/library/cc770963.aspx
Repadmin /replsummary
Identifies domain controllers that are failing inbound replication or outbound replication, and
summarizes the results in a report.
Repadmin /showrepl
Displays the replication status when the specified domain controller last attempted to
perform inbound replication on Active Directory partitions.
Repadmin /syncall Synchronizes a specified domain controller with all replication partners.