Which type of query must be configured when setting up the Spam Quarantine while merging...

Spam Quarantine Alias Consolidation Query is a type of query that must be configured when setting up the Spam Quarantine while merging notifications on Cisco ESA. This query allows Cisco ESA to consolidate multiple email addresses that belong to the same end user into one entry in the Spam Quarantine, and send only one notification email to that end user with all the quarantined messages for all their email addresses.

References: User Guide for AsyncOS 15.0 for Cisco Secure Email Gateway, page 10-10.