Directory and Resource Administrator 6.x
The 'Groups and Members' report takes a long time to complete in the Reporting Tool.
The cause of this issue is due to the time required for the Reporting tool to build the list of groups in the 'Criteria Group' form.
This issue is addressed in Directory and Resource Administrator 7.0. In DRA 7.0, the Criteria Group form adds an additional option with a text box to specify a specific group to run the report on.