An updated version of the resource kit tools is now available. It contains an updated version of ABSConfig, for more details see: 2578808 (http://support.microsoft.com/kb/2578808/ ) The ABSConfig tool does not function correctly when you use the tool to customize the Address Book Service configuration or restore default attributes in Lync Server 2010
Download: Lync Server 2010 Resource Kit Tools – Microsoft Download Center – Download Details