Consider the following scenario:
- The cumulative update for Microsoft Lync Server 2010, Core Components that was released in October 2012 is installed in a Lync Server 2010 environment.
- You open a Call Leg Media Quality Report in the environment.
- You open a Call Leg Media Quality Trend Report and drill down to a trend. To do this, you click "Trend", and then you click a trend line in a graph such as the "Call volume" or "Poor call percentage" graph.
The 'Filter_PeriodStart' parameter is missing a value