Your network contains two standalone serversnamed Server1and Server2that have Active Directory
Lightweight Directory Services (AD LDS) installed.
Server1 has an AD LDS instance.
You need to ensure that you can replicate the instance from Server1 to Server2.
What should you do on both servers?

A.
Obtain a server certificate.

B.
Import the MS-User.ldf file.

C.
Create a service user account for AD LDS.

D.
Register the service location (SRV) resource records.

Explanation:
http://technet.microsoft.com/en-us/library/cc794857%28v=ws.10%29.aspx
Administering AD LDS Instances
Each AD LDS instance runs as an independent—and separately administered—service on a computer. You
can configure the account under which an AD LDS instance runs, stop and restart an AD LDS instance, and
change the AD LDS instance service display name andservice description. In addition, you can enable Secure
Sockets Layer (SSL) connections in AD LDS by installing certificates. In Active Directory environments, each
AD LDS instance attempts to create a Service Principal Name (SPN) object in the directory to be used for
replication authentication. Depending on the network environment into which you install AD LDS, you may have
to create SPNs manually.
AD LDS service account
The service accountthat an AD LDS instance uses determines the access that the AD LDS instance has
on the local computer and on other computers in thenetwork. AD LDS instances also use the service
account to authenticate other AD LDS instances in their configuration set, to ensure replication
security. You determine the AD LDS service account during AD LDS installation.