Even though reports default to the last 7 days, you can still view up to 12 months of data in the Detailed Reports section of the Hub.
To report on previous messages, select a date range:
1. Click anywhere in the Date range box, then use the arrows to navigate and select a start and end date from the calendar.
2. You can also select one of the commonly used date ranges via the quick links.
The data will automatically refresh, just scroll down to view the logs.