1) From the qlik help:
Installing and updating the license
You need to install a valid license to start using the SAP Connectors. When installing the license in a server environment, the license must be installed on the server, and on all nodes in a multi-node system. When using a desktop version of QlikView the license is installed on the local machine.
2) Yes, it is supported.
Thank you very much Tomas for your reply.
Sorry but regarding question 1, I am still not clear. Customer has bought a valid license and is using it in a QV server. Now if they buy another QS server, will that license become invalid on that new server? Is a license valid per customer or per server?
You can check the QlikView License Metrics guide at http://www.qlik.com/us/license-terms
I also suggest that you reach out to your Qlik account manager with this question.