How do I get the list of contacts who have unsubscribed from a Marketing List?

You can find this information on a Marketing List record for unsubscribed recipients.
Follow these steps to get the list of unsubscribes:

1. Log in to your CRM account.
2. Click the Main Menu .
3. Go to Marketing.
4. Select Marketing Lists.
5. Open a marketing list.
6. Click Recipients > Unsubscribes in the Summary View.