Same question. We have a main 3CX server that we pay for maintenance on, but have a test server that we use to try out upgrades before updating the production server. This second server just has the demo version on it, because we never need more than 2 calls on it to test things out. I would like to test 12.5 SP1 on that server before updating production, but am not able to. Is there a way around this limitation?