Since LySS is an SQL Express Instance it has some of the limitations of SQL Express Installation like 1 GB Maximum RAM Utilization, 1 CPU Max Utilization, and 10 GB Max DB Size. Monitoring Data ( CDR & QoE Reports) which are sent to your Monitoring Server, defined in the topologyĪrchiving Data ( for Content Archiving if enabled), which are sent to the Archiving Server, defined in the topology LySS can have different types of data, but mostly has the following types of data The LySS database is part of the LyncLocal Instance on all servers. In Lync Server 2013, we introduced Lync Server Storage Service (LySS), as a replacement for Message Queuing(MSMQ). For Lync Server 2010 and prior versions, we had Message Queuing (MSMQ), have messages stored on a communications server, which were transported to the Monitoring Server and the Archiving Server, using MSMQ, and then were consumed into respective server roles using an Agent. Monitoring and Archiving has undergone major changes since Lync Server 2010. First published on TECHNET on Mar 27, 2017