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As SQL Safe 9.3 introduces new CWF WCF protocols, it is important to understand the impact on compatibility with older agent versions. This guide provides essential information to help you upgrade effectively.

• Incompatibility with older agents:
  With the introduction of CWF WCF in SQL Safe 9.3, previous agent versions that do not include the CWF WCF changes are no longer supported in a mixed version environment.
• Backup processing:
  Previously, you could upgrade the Management Service while still using older agent versions. However, upgrading the Management Service will prevent communication with those prior agent versions, as they do not use the new CWF WCF protocols.
  Although older agents will still process backups, their statuses will not be sent to the Management Console. 
• Upgrade wizard:
  SQL Safe provides a mass upgrade wizard to simplify the upgrade process for agents.
  
  

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By following this guide, you can ensure a successful transition to SQL Safe 9.3 version while minimizing potential disruptions.