Acronis Backup for Windows Server Essentials - User Guide - Manual (Page 130)

130 Copyright © Acronis International GmbH, 2002-2014

If you use third-party software for backing up the SQL Server data. The reason for this is that the
third-party software will take the resulting disk-level backup for its "own" full backup. As a result,
the next differential backup of the SQL Server data will fail. The backups will continue failing until
the third-party software creates the next "own" full backup.

If other VSS-aware applications are running on the machine and you need to keep their logs for
any reason.
Enabling this option does not result in the truncation of Microsoft SQL Server logs. To truncate the
SQL Server log after a single-pass backup (p. 303), enable the Log truncation setting in the
Single-pass disk and application backup (p. 307) section of the Create backup plan or Back up now
page.