To disable local spam quarantine before external quarantine is enabled on Cisco ESA, two steps are needed:
Select Security Services and click Spam Quarantine, which will open the Spam Quarantine settings page.
Uncheck the Enable Spam Quarantine check box, which will disable the local spam quarantine feature on Cisco ESA.
[References: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 10-2., , , , , Reference: https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118555-qa-esa- 00.html (configuration summary), ]
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