Was hoping this issue was resolved in SP 2016. I'm on prem with a public facing website.
I have 3 managed metadata term sets setup. I created a site column for each term set. I created both multi value select and singe select managed metadata columns. With single select columns i can use cqwp to query the entire site collection and pull pages based on a term or any term within termset.
The issue is the end goal is to allow users to tag pages with up to 3 terms within each term set. I've found the only way to use content query web part with multi-select is to point to a specific page library. In my case I need to query the entire site collection.
Is this possible with cqwp or any other web part for that matter? Are there custom solution options or is this a limitation with managed metadata?