This currently (in 2017!) can’t be done and hasn’t been possible for at least 3 years. Pagination is the only option, which is pretty useless. Forcing my UI to conform to arbitrary API limits defeats the goals of an effective API.
Not only that, but this means I’ll simply hit the endpoint several times in succession to get (in my case) about 500 users. The cost of 3 requests of 200 vs 1 of 500 is probably higher with the forced pagination.
I submitted a support ticket and was basically told “this isn’t possible,” which strains credulity. I don’t know if this feature request will accomplish anything before we get fed up and move to a different SSO solution, but I thought I’d give it a try.