I'm wondering what the idea is behind the functionality to move domains to another customer. I found it needs to be enabled in the settings and there is also some sort of warning.
I tried that now for testing purposes and the process is not clear to me. I moved the domain and within froxlor everything looks quite OK. The data on disk has not been moved (as mentioned in the comment). So far so good. But next I wanted to get rid of the original customer and removed it from the panel. I also have chosen (with the possible risk in mind) to remove the customer data.
Now really th