Hi Anat,
Firstly, sorry you were having problems with the forum, your posts were there but not showing for some reason, but I think I've solved it!
The Atik One doesn't have desiccant but the argon-purging should last a minimum of five years, at which point we'd be able to redo it for you as part of a service - which you might like any way after that long! And that's also a lot longer than desiccant which you'll have to recharge every couple of years or so.
I hope that helps,
Jo