There are 2 ways to get a list of properties by group:
1. From the My Portfolio page, click on "Add/Edit/Delete Groups" to see a list.
2. In Reporting, you can run a report of all your properties and add the metric "Group(s)." Then, sort the generated report by the Group column. If your properties are in more than one Group, the groups will be listed in one cell, separated by commas.