Endpoint Protection

no, you can upgrade your sep 11 licence to sep 12

https://www-secure.symantec.com/connect/articles/how-upgrade-your-sep11-license-sep12-online

Edit #

Check this same thread

https://www-secure.symantec.com/connect/forums/can-we-convert-sep-11-license-sep-12

11.x was just a paper license

With 12.1 you will get a license file which you need to input into the SEPM to keep track of licensing.

On 12.1 you get a 30 days trial for migration if I am not wrong, and after that you will need the serial number or the license file.

Hi,

SEP 11.x licensing is basically just a "paper" license product.  However, with SEP 12.1 the licensing is a "software" license product and uses a  license file.  It is important to become familiar with this license concept.

Depending upon the license vendor, you receive either a product license serial number or a Symantec License file. License files are either sent to you in email or downloaded from a secure Web site. The license file uses the file extension .SLF (Symantec license file ). When the license file is sent by email, it is attached to the email as a .ZIP file. You must extract the .SLF file from the .ZIP file.

You should check this article

SEP 12.1 & license concept

https://www-secure.symantec.com/connect/articles/sep-121-and-license-concept