The distributed deployment scenario is recommended for large geographically dispersed virtual environments with multiple Veeam backup servers installed across different sites. These backup servers are federated under Veeam Backup Enterprise Manager:
Veeam Backup Enterprise Manager collects data from Veeam backup servers and enables you to run backup and replication jobs across the entire backup infrastructure through a single pane of glass, edit them and clone jobs using a single job as a template. It also provides reporting data for various areas — for example, all jobs performed within the last 24 hours or 7 days, all VMs engaged in these jobs and so on.
Besides, using Veeam Backup Enterprise Manager simplifies tracking license usage and license updates across multiple Veeam backup Servers. You can install one license on the Veeam Backup Enterprise Manager server and it will be applied to all servers across your backup infrastructure.