Hi Tiago,
Please have a look on below article describing backup best practices for EV:
https://www.veritas.com/support/en_US/article.000014434
Also, to answer your questions:
1) Using BackupExec, what configuration do you use for backup? A one-off job? Or separated?
A: If you are using the BE EV agent, it is very simple, just select all EV components and have a daily incremental and weekly full at minimum. This will backup the databases as well. Else, if you use normal filesystem backup type, you need to create one backup policy that includes indexes, vault stores, and storage queues. If you have multiple servers, you may need to create multiple policies.
2) In SQL maintenance tasks, do you make full backup of the databases as well?7
A: Just do the maintenance since you are taking the backup with BE. Have a look at this article: https://www.veritas.com/support/en_US/article.000040169
3) And in maintenance tasks, do you create separate tasks or a unique one?
A: One task covering all operations as documented in the above article.
--Virgil
