Dear abdi,
Thank you for your question.
I thought that the key was not used simultaneously on several servers. As I understood, they have moved the key from one server to another.
The type of key they have can only be used on one server at a time.
Hello Alexey_Shpak,
There is no SUS on your Plesk key; that is why this license cannot be upgraded to version 11. More details about SUS are provided here:
http://kb.parallels.com/111
Your Plesk key can be used on a single server, not on multiple ones.
There was active SUS on the...