The Duplicate MSG File Found area of the Export MSG Collection dialog allows you to specify what should happen if a Message (MSG) file is found that has the same file name. There are two options:
Create New With Incremental Counter - This option will add an incremental counter to the target Message (MSG) file name when a duplicate is found.
Overwrite Existing - This option will overwrite the existing Message (MSG) file with the exported data when a duplicate is found. This will destroy the existing Message (MSG) file.