One of the major Lync 2010 administrative shortcomings was the lack of a global logging facility. Server tracing required individually configuring, collecting, analyzing, and correlating separate logs from all involved machines. This turned into a considerably ineffective experience on larger deployments. Lync 2013 got a significant overhaul through the Centralized Logging Service (CLS). However, as it is only accessible through the command line (via CLScontroller.exe and other PowerShell cmdlets) and the many options around it, its usage is less than straightforward.

Centralized Logging Tool by Lync MVP James Cussen is a CLS graphical wrapper, which provides a far more intuitive yet cohesive logging experience with just a few mouse clicks.