By default, if dbmlsync fails during a download it does not apply any of the download data to the remote database. However,
it stores the part of the download it did receive in a temporary file on the remote device, so that if you specify ContinueDownload=on
the next time you synchronize, it can more quickly complete the download.
When you specify ContinueDownload=on, dbmlsync attempts to download the part of the previous download that it did not receive.
If it is able to download the remaining data, it applies the complete download to your remote database, otherwise synchronization
If there is any new data to be uploaded when you set ContinueDownload=on, the restartable download fails. You can also restart
a failed download using the ContinueDownload extended option or the sp_hook_dbmlsync_end hook.