I just purchased SEP 14 license. I am new SEP user, never purchase SEP before. I want to install version 12.1 instead.
Can I downgrade my license?
This is a question you'll meed to ask of Symantec support. The SEP 14 license should also be applicable to 12.1. However, if you're just looking to download 12.1 software then you'll have to contact support so they can provide a different serial number for the download.