Why does the Delivery Time Threshold Within Site/Administrative Group in Exchange Service Delivery Executive Summary report not display all Admin Groups?
The report is working as designed as Locally Delivered Messages are not taken into account. This coupled with the fact that any admin group with just one server in the group will not have any IntraSite traffic.
Locally delivered messages mean messages within the same Exchange Server. This will only include the intra site traffic.
The problem is with the Delivery Time Threshold Within Site/Admin Group not having all of the Site/Admin Groups. The problem will exist for any site admin groups that have only one server, as this report processor does not currently count locally delivered messages.