Running the Mailbox Security Reports returns 'No Data' or the data is out of date.
The Mailbox Security Gathering is not included in the daily default gathering.
You must create a separate Mailbox Security gathering to gather this information:
1. Open the MessageStats console
2. Expand Exchange Organizations
3. Right click your Organization name and select Create Task
4. Provide a name for the new task and select Exchange Mailbox Security as the task template
5. Step through the rest of the wizard to configure the schedule and create the task.
Run the Exchange Mailbox Security gathering to populate the Mailbox Security reports