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Exchange differential backups fail - Connect IT Community | Kaseya
<main> <article class="userContent"> <h2 data-id="summary"><strong>SUMMARY</strong></h2> <p>This article addresses an issue that causes Exchange differential backups to fail, where Exchange full backups are successful.</p> <h2 data-id="issue"><strong>ISSUE</strong></h2> <p></p> <h3 data-id="applies-to">Applies To</h3> <p>RecoveryOS version 5.0+</p> <p>Client Agent software version 5.0+</p> <p>MS Exchange 2003/2007/2010/2013</p> <h3 data-id="symptoms-description">Symptoms / Description</h3> <p><b>ISSUE: </b>Exchange differential backups are failing though Exchange full backups are successful. In the Windows event logs, the following error occurs after the Exchange differential backup is attempted.</p> <p>Event Type: Error<br>Event Source: MSExchangeIS<br>Event Category: Exchange VSS Writer</p> <p>Exchange VSS Writer (instance xxx) failed with error code 1296 when collecting private metadata information for storage group 'IDE Storage' in preparation for backup.</p> <p>For more detailed information on backup failures and performance issues see <a rel="nofollow" href="/home/leaving?allowTrusted=1&target=https%3A%2F%2Funitrends-support.zendesk.com%2Fhc%2Fen-us%2Farticles%2F360013174757">Unitrends KB 5062 - Backup Failures and Performance Issues</a></p> <p> </p> <p> </p> <h2 data-id="resolution"><strong>RESOLUTION</strong></h2> <p></p> <p>To resolve this error, turn off circular logging, restart your Exchange server and then run a new full backup. To disable circular logging, refer to <a rel="nofollow" href="/home/leaving?allowTrusted=1&target=http%3A%2F%2Fsupport.microsoft.com%2Fdefault.aspx%3Fscid%3Dkb%3Ben-us%3B314605%26sd%3Dtech">MS KB article 314605</a>.</p> <h3 data-id="third-party-sources">Third-Party Sources</h3> <p><a rel="nofollow" href="/home/leaving?allowTrusted=1&target=http%3A%2F%2Fblogs.technet.com%2Fb%2Fexchange%2Farchive%2F2010%2F08%2F18%2F3410672.aspx">Best Practices of Exchange Server Preventative Maintenance<br><u>Exchange Circular Logging and VSS Backups</u></a><br><a rel="nofollow" href="/home/leaving?allowTrusted=1&target=https%3A%2F%2Fsupport.microsoft.com%2Fen-us%2Fkb%2F218004">Circular Logging Prevents Backing Up Your Small Business Server<br>What is Circular Logging?</a><br><a rel="nofollow" href="/home/leaving?allowTrusted=1&target=http%3A%2F%2Fsearchexchange.techtarget.com%2Fnews%2F1210839%2FClearing-the-confusion-around-circular-logging%3Fvgnextfmt%3Dprint">Clearing the confusion around circular logging</a></p> <h2 data-id="cause"><strong>CAUSE</strong></h2> <p><b>Circular logging</b> manages Exchange transaction logs, truncating this logs to conserve space. Exchange differential backups rely on a complete log chain to perform a successful backup. When circular logging truncations a log in the log chain which is required for a successful Exchange differential backup, this cause the subsequent Exchange differential backups to fail.</p> </article> </main>