The throughput of the Zarafa Backup has been greatly improved by the additional option to run the backup with multiple threads and in addition to the removal of message body content in multiple formats. The number of concurrent threads can be set in the backup.cfg file and should be adjusted to an optimal setting related to the server load and backup time. Initially set to threads = 1, the setting should be increased +1 per run to avoid system load issues. A full backup baseline should be used for this.