Your company has a server that runs an instance of Active Directory Lightweight Directory
Service (AD LDS).
You need to create new organizational units in the AD LDS application directory partition.
What should you do?

A.
Use the dsmod OU <OrganizationalUnitDN> command to create the organizational units.

B.
Use the Active Directory Users and Computers snap-in to create the organizational units
on the AD LDS application directory partition.

C.
Use the dsadd OU <OrganizationalUnitDN> command to create the organizational units.

D.
Use the ADSI Edit snap-in to create the organizational units on the AD LDS application
directory partition.

Explanation:
Answer) Use the ADSI Edit snap-in to create the organizational units on the AD LDS
application directory partition.

http://technet.microsoft.com/en-us/library/cc773354%28v=ws.10%29.aspx
ADSI Edit (adsiedit.msc)
Active Directory® Service Interfaces Editor (ADSI Edit) is a Lightweight Directory Access
Protocol (LDAP) editor that you can use to manage objects and attributes in Active Directory.
ADSI Edit (adsiedit.msc) provides a view of every object and attribute in an Active Directory
forest. You can use ADSI Edit to query, view, and edit attributes that are not exposed
through other Active Directory Microsoft Management Console (MMC) snap-ins: Active
Directory Users and Computers, Active Directory Sites and Services, Active Directory
Domains and Trusts, and Active Directory Schema.
http://technet.microsoft.com/en-us/library/cc730701%28v=ws.10%29.aspx#BKMK_1
Step 4: Practice Managing AD LDS Organizational Units, Groups, and Users
Create an OU
To keep your AD LDS users and groups organized, you may want to place users and groups
in OUs. In Active
Directory Domain Services (AD DS) and in AD LDS, as well as in other Lightweight Directory
Access Protocol
(LDAP)–based directories, OUs are most commonly used for keeping users and groups
organized.
To create an OU
1. Click Start, point to Administrative Tools, and then click ADSI Edit.
2. Connect and bind to the directory partition of the AD LDS instance to which you want to
add an OU.
3. In the console tree, double-click the o=Microsoft,c=US directory partition, right-click the
container to which you want to add the OU, point to New, and then click Object.
4. In Select a class, click organizationalUnit, and then click Next.
5. In Value, type a name for the new OU, and then click Next.
6. If you want to set values for additional attributes, click More attributes.
Further information:
http://technet.microsoft.com/en-us/library/cc754663%28v=ws.10%29.aspx
Step 5: Practice Working with Application Directory Partitions

The Active Directory Lightweight Directory Services (AD LDS) directory store is organized
into logical directory partitions. There are three different types of directory partitions:
Configuration directory partitions
Schema directory partitions
Application directory partitions
Each AD LDS directory store must contain a single configuration directory partition and a
single schema directory partition. The directory store can contain zero or more application
directory partitions.
Application directory partitions hold the data that your applications use. You can create an
application directory partition during AD LDS setup or anytime after installation.