Need help for Exchange server 2019 Databases backup through Netbackup or Backupexec

Hi,

Currently taking backup of Exchange server 2019 databases through another solution. which i need to replace with Veritas Netbackup or BackupExec. is there any email address of concern Veritas team to start coordination?

Need some details regarding the below points. 

Environment:

1:

Exchange Server 2019 single DAG with 6 servers in primary site and 3 Servers in DR site.

2:

would like to take backup of the Databases only on the 3 servers in DR sites.

3:

which tool (Backupexec or Netbackup) i can use?

4:

which license i would need to purchase?

5:

The total size of the Databases is in TBs