Once a report is built and you are happy with it, the Export button appears just below the Run Report button.
Selecting Export moves the finished report from the Global Reports section into the Global Exports section of the reporting tool.
Global Exports
This lists every report you have created along with the request date for each. To get the file, select Download from the Action column, which gives you a Microsoft Excel Workbook.
There is also a Search bar, which is useful once you have run the same report type several times across different dates and need to find a particular one.