Archiving in Lync Server 2013 can archive the following types of content:
- Peer-to-peer instant messages
- Conferences (meetings) that are multi-party instant messages
- Conference content, including uploaded content (for example, handouts) and event-related content (for example, joining, leaving, uploading sharing, and changes in visibility)
Additionally, Archiving in Lync Server 2013 provides new features that improve deployment and operations efficiency.
Read more at source: