Like all software, you need to purchase the product and pay for the licensing. Below is a like to help you determine what R2 will cost your organization. Talk with your Microsoft Licensing Specialist to iron out the details.
www.micrsoft.com/windowsserver2008/en/us/pricing.aspx
AD LDS allows you to provide directory services to applications that are free of the confines of Active Directory. To list all the AD LDS instances on a server, follow this procedure: Log into the server in question Open a command prompt. Type dsdbutil and press Enter Type List Instances and press Enter . You will receive a list of the instance name, both the LDAP and SSL port numbers, the location of the database, and its status.
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