The screen shows a summary of the export results, with an overall status for each archive.

Click View Report file to see more detail. The report file is stored in the Enterprise Vault reports folder, normally:

C:\Program Files\Enterprise Vault\Reports\

You may want to keep the report file for your records.

Additionally, there is a summary entry in the Windows Application Log for each archive that was processed. Note that the entry for an archive is logged by the Storage service that manages that archive, so if you have selected archives that are managed by several Storage services the log entries will be split across several computers.