As of now there is no known workaround. You may want to check with support or raise idea on Idea section of community.
I can see how complex this can be due to the fact that we not only need to have fully working user authentication with Qlik Sense but also with NPrinting and then seamless authentication between both tools when used with OnDemand.
I believe current OnDemand solution with Qlik Sense is based on API which to best of my knowledge as of now only supports NTLM authentication.
Rumor has it - there may be changes coming, but I cannot confirm anything 🙂
cheers Lech, When applicable please mark the correct/appropriate replies as "solution" (you can mark up to 3 "solutions". Please LIKE threads if the provided solution is helpful to the problem.