We had to set up Management Data Warehouse (MDW) to monitor. I was able to trace the SQL Code that was causing the blocking by drilling down the Server Acitviy Report for that time frame. There was a spike in 'locks', just had to drill down on it.
Sorry if I was not clear. I meant within MDW, is this info available to you via the information collected by the Default Data Collector or do you have some Custom Data Collectors setup as well that makes this research possible?
__________________________________________________________________________________________________There are no special teachers of virtue, because virtue is taught by the whole community. --Plato