With the remoting extension for ISPConfig, you can add users to as many servers as you like.
Sure it is! But each each server has its own remoting connection, so my inscription page needs to know all my available servers to be able to create account on the least used.
I have the same reseller account created on each server, then I must get web list from each one to make a "web_speicher" sum and select server which has the more web space left...
So each time I add a server, I must add its remoting parameters to my init stage that selects server before displaying the account creation form.
If anyone is interested in such a php form, I'll post it when done...
But if you already have one, I'll be glad to have it.