Hi Timothy,
Nope, not at all. You can install BE 2010 R3 and the minute you try install BE 2012 it's going to detect a previous version and offer to upgrade. No option to install both side-by-side.
Thanks!
For upgrading purposes there is some limited compatibility as stated in the Backup Exec 2012 SCL http://www.symantec.com/docs/TECH175581 "Backup Exec 12.5, 2010, 2010 R2, and 2010 R3 Agents are compatible with 2012 Servers for the purpose of upgrades only. This configuration is not recommended or supported for extended periods. Every effort should be made to get all Backup Exec components to the same version as soon as possible. Please refer to <http://www.symantec.com/docs/TECH39208> for more details."
If you want to run in this configuration it would be best to use Backup Exec 2010 R3 as the media server. You can contact licensing for information about downgrading from Backup Exec 2012.
