# Finding the Organizational Unit Distinguished Name
<a name="active-directory-oudn"></a>

When you register your Active Directory domain with WorkSpaces Applications, you must provide an organizational unit (OU) distinguished name. Create an OU for this purpose. The default Computers container is not an OU and cannot be used by WorkSpaces Applications. The following procedure shows how to obtain this name.

**Note**  
The distinguished name must start with **OU=** or it cannot be used for computer objects.

Before you complete this procedure, you'll need to do the following first:
+ Obtain access to a computer or an EC2 instance that is joined to your domain.
+ Install the Active Directory User and Computers MMC snap-in. For more information, see [Installing or Removing Remote Server Administration Tools for Windows 7](https://technet.microsoft.com/en-us/library/ee449483.aspx) in the Microsoft documentation.
+ Log in as a domain user with appropriate permissions to read the OU security properties.

**To find the distinguished name of an OU**

1. Open **Active Directory Users and Computers** in your domain or on your domain controller.

1. Under **View**, ensure that **Advanced Features** is enabled.

1. In the left navigation pane, select the first OU to use for WorkSpaces Applications streaming instance computer objects, open the context (right-click) menu, and then choose **Properties**.

1. Choose **Attribute Editor**.

1. Under **Attributes**, for **distinguishedName**, choose **View**.

1. For **Value**, select the distinguished name, open the context menu, and then choose **Copy**.