Backup Exec 2014/15 - SQL Express 2008 R2 SP2 update to SP3 supported?

Dear All 

Because the support of SQL Server 2008 R2 SP2 ends on 10/08/2015 I want to install the SP3 on the Backup Exec Servers (versions 2014 and 15 in use). Unfortunately I can't find any informations about this topic.

Does anyone know whether it's supported or not?

Thank you!