Hello everyone,
We are currently running Alteryx Server 2020.4 with built-in authentication.
The ability to share to a collection is missing from the sharing option button.

And we have configured the user the way it should.

The weirdest thing is that I'm able to go to the collections page, create a collection and add a workflow from my studio from there. So it seems like a bug and it was happening in 2020.2 version as well.
Best,
Fernando Vizcaino