I am aware that there is a test version available. And as long as the perpetual license is not there, that is exactly what it is, a test version without any promise of support.
As far as the AppSupport and MS Exchange support, the OP of this thread really sends another message than offering a test version or an early release. It says it is available as a SaaS option with a discount. E.G. Jolla is trying to lure people in. I’m sorry, but for me SaaS is not ever going to be acceptable on my phone when it comes to the essential functions. So no perpetual license means no sale. And if that perpetual license gets postponed past the life time of my current 10 III, I will have to exit the ecosystem.