upgrading symantec backup exec 2012 to symantec backup exec 2014 free

First contact Symantec Licensing Team for BE 2014 license keys. For contact info refer to the below link

http://www.symantec.com/business/support/index?page=content&id=HOWTO42310

For upgrading BE refer to the below steps.

1) Stop all BE services including BKUPEXEC SQL service.

2) Make a copy of Data and Catalogs folder located in the installation directory of BE.

3) Download BE2014

4) Extract the ISO on the local drive of the BE media server.

5) Run setup

6) Onec the upgrade is done run Liveupdate to install all the latest hotfixes.

7) Update all the remote agents.

Read BE2014 Software and Hardware compatibility list before upgrading.

You may refer to the below article on upgrading BE.

http://www.symantec.com/docs/HOWTO98878

Also refer to the below blog for BE2014 useful links

https://www-secure.symantec.com/connect/blogs/be2014-download-link