In Lync Server 2013 the Application Sharing Conferencing Server service is responsible for desktop and application sharing in conferences. This role is installed on all Lync Front End servers, and is one of the many MCUs in Lync Server 2013. Because each Lync Server handles all conferencing modalities, the boundaries for each MCU are often mixed up. The following list describes the MCUs in Lync Server 2013, and what they are used for:
• Web Conferencing—Manages conferencing data collaboration (see the section “Collaboration Content” for more information).
• A/V Conferencing—Manages audio and video media streams in conferences.
• IM Conferencing—Manages Instant Messaging conferencing in conferences.
• Application ...