Currently the Customfield doesn't support it, but you can use the following JQL workaround:
You can also use this as a quick filter.
It sounds like you found a great way to search empty JIRA Portfolio Team fields. From the description it appears you were just providing knowledge. If that's the case thank you!
If I'm missing the question let me know and we'll go from there.
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot