To view a report of your agents along with their office and the primary contact (usually the broker) for the office you can use the Contacts Report:

For this example, we will apply the following criteria:

• Contact Type: Agent
• Contact Status: Active
• Additional Criteria/Filter: Primary Business Is Not Empty (this is optional but in our test database we only want agents with a related primary business)
• Fields to Display: add Primary Contact's Primary Contact Name and (optional) Primary Business
• Summarize By: (optional) Primary Business (you could also group by Primary Contact's Primary Contact Name to group by broker)

Click Run Report.