Developer's DescriptionBy MicrosoftDevelop applications to customize and extend the functionality of Microsoft Lync Server 2010.Microsoft Lync Server 2010 SDK includes library, tools, documentation, and sample applications for developing server-side SIP applications to customize and extend the functionality of Microsoft Lync Server 2010. The server applications can be written using Microsoft SIP Processing Language (MSPL) scripts or a .NET Framework programming language, such as C#.