Hi Bharat, the product will only allow you to activate upto 3 x trial keys. If you have reached this limit already and still have testing to perform, please contact our sales team who can work with you and assist.
Hi John, the trial period provides the full Enterprise Edition features for 15 days. Once the trial expires the product automatically reverts to the "free edtion" which has a limited feature set. You can see the different features comparing free, Professional and Enterprise editions on our website: https://saas.hpe.com/en-us/software/vm-server-backup (scroll down the page and you'll find table listing the different offerings and what's included in them). A big limitation of the free edition is the last of task scheduler, so you can't automate the running of jobs.