So there are quite a few new features in the Lync server 2013. Some of them are related to structural changes while others make server management optimal.
Archiving server roles and front end servers can co exist now! This not only eliminates the need for separate Archiving servers but also helps to reduce the server footprint required. The archiving service uses unified data collection agents which are present on all front end servers and standard edition servers. The added advantage of this approach is that no message queuing (MQ) service is required in this architecture. It has been replaced by Lync storage service. Another important advantage of this version is that you can use Lync for archiving store or Exchange Server 2013.
Once you have enabled archiving in the Lync Server Management Console, you are ready to go. Integration with Exchange Server 2013 is also possible now, briefly going over the process of how archiving to Exchange Server 2013 works. You would find out that it is pretty similar to archiving to SQL. The first step is to check the box for Exchange Server Integration when configuring the archiving settings in Exchange Server 2013. When Enable Exchange Archiving is set to True, Lync Server 2013 instant message and conferencing transcripts are stored in Microsoft Exchange Server 2013 rather than a separate SQL Server database. Lync Server will use the OAuth to connect to the user’s mailbox in Exchange 2013 but for this you would need to configure both Lync Server 2013 and Exchange Server 2013 for OAuth. After that you can set the Exchange Archiving policy to set the path where the archived messages are to be stored. When the user is set to archive into Exchange Server 2013, the messages are stored in a hidden folder (Recoverable Items > Purges) in their mailbox.
Unlike Lync Monitoring Server 2010, Lync Monitoring Server 2013 does support the monitoring of Whiteboard and Poll sessions. This feature has been added in Lync Server 2013 archiving. In reference to the MediaId saved in Medalist Table of LcsCDR Database, CDR Table Details includes the records that represents one media type used in a peer-to-peer session so one session may have multiple records in the table if more than one media type is used in this session.
So all these new features have given Lync archiving a broader usage dimension which adds to the power of the feature as a whole and helps the clients better perform their tasks.