Lync is a living, breathing ecosystem that is constantly changing, and of course this means that you need to establish key metrics and monitor those metrics on a regular basis. One slight twist to our recommendation is to focus on the end-user impact of these measurements. Typically, technology services are measured at the server level or application level. We suggest that you test and measure Lync from an end-to-end perspective in the same way that an end user would be exercising the system. This is important because several pieces to the puzzle are actually out of your control and beyond the reach of your datacenter monitoring solutions.