This update for Microsoft Office Communications Server 2007 R2, Microsoft Unified Communications Managed API 2.0 Core Redist 64-bit adds support for situations in which Outlook Web App (OWA) interoperates with a site that has the upcoming version of Lync Server installed, and that has IPv6 enabled.
For more information about this update, click the following article number to view the article in the Microsoft Knowledge Base:
2686823 Description of the update for Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: April 2012
After you apply the update, the protocol stack has the following abilities:
The protocol stack can handle an IPv6 IP address that is obtained from the received parameter in the Via header.
The protocol stack can handle a digit at the beginning of a host name that is converted from an encoded IPv6 address.