Qora wouldn't be giving up its rights to Microsoft I don't believe.
I've been wrong before, why would you say this?
If they join Azure BAAS without paying then indeed they would be giving up the IP rights (that is in the legal contract for using the service for free).
From what I gather if you pay for said service then you can retain the IP rights (that would of course need to be verified) so if going down this path at all then I hope that it is going to be funded.