Follow the below steps to enable Organization Insights preview feature in Dynamics CRM 365.

Step 1: Open Dynamics 365 CRM Online. Go to Settings -> Administration -> System Settings -> Previews.

Step 2: Select I have read and agree to the license terms.

Step 3: Select Organization Insights Preview (Enable Organization Insights Preview) as Yes and click on OK.

Step 4: Refresh the CRM Online Organization. Go to Dashboards and Click on the Organization Insights Dashboard.

Step 5: Below Dashboard will be displayed with different types of charts related to the Organization.

Hope you have learned a new feature today :):):)