Hello mate, A senior systems engineer with 3 years of industry experiences. I have experiences with both AWS cloud and 3CX. But I'm wondering that why you selected Amazon Windows instance for this. Because it is expensive compared to VPS. Anyway if it is not a matter, I can undertake this job. Of course you can pay me after I complete your task. If you want to talk to me I'm available on Skype too. My Skype ID is yasithab. Waiting for your reply. Thanks!