Moving the data to the final destination in Exchange depends on average file size, total number of files, number of files ...

Moving the data to the final destination in Exchange depends on average file size, total number of files, number of files per user, mailbox distribution in the data center and other jobs importing into the same destination databases. Large files, large number of items per folder, multiple files targeting the same user, multiple jobs targeting the same databases tend to increase import times and may take weeks or months to complete.