!!! Overview 
Most companies have multiple directory services deployed in their environments, such as multiple AD forests and domains. While this is a sound operational practice, this results in user identity information being scattered across separate directory repositories. This poses a significant challenge when attempting to deploy enterprise applications to the users existing in these directories. 

The [Virtual Identity Server|http://www.optimalidm.com/products/vis/Virtual-Directory-Server-VDS.aspx|target='_blank'] solves this by providing a single joined view of data from these separate directories. Applications connect to the VIS exactly as they do any normal LDAP directory. In fact, [{$pagename}] looks and behaves just like a standard [Microsoft Active Directory] or [ADAM] server to the LDAP enabled client application. The key benefit is multiple directories can be joined in real-time without the need to duplicate LDAP objects.  

!! More Information 
There might be more information for this subject on one of the following: 
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