For organizations that have archiving or compliance needs, Lync Server provides the Archiving function, which captures IM traffic and web conferencing data. New for Lync 2013, this function is collocated on all the front-end servers in a pool. All archiving data is saved either to a Microsoft SQL Server database or to Exchange Server 2013, depending on the environment and administrator’s choice.
Archiving can be enabled at the pool level to capture traffic for all users or it can be enabled on a per-user basis if archiving needs to be done only for a select group of users. If an organization has no need to capture internal traffic, archiving can also be configured to log only federated traffic.