Users can import more than one .pst file by clicking Import Another in the Import Completed dialog. If they want to import more .pst files at a later time, they can run the Import Wizard for any additional files. Each .pst file will be merged with their previously imported .pst files.
When additional .pst files are imported, the imported items are merged with the previously imported items (e.g. Any mail from the additional .pst file will be added to the ZCS Inbox folder, where mail from previously imported .pst files has been stored).