I was trying to perform an advance search via Elastic Search (https://docs.zammad.org/en/latest/install-elasticsearch.html) for:
- state: closed owner.email: null
- state: closed owner.email: “”
- state: closed owner.email: -
state: closed owner.email: FALSE
But none of these is working to find the unassigned.
Did I missed out something or it can’t be done?
Thanks.