For diagnosing known issues in the configuration and performance of the backup infrastructure without the direct involvement of Veeam Technical Support, the administrator should utilize A:
Intelligent Diagnostics in Veeam One. Intelligent Diagnostics is a feature designed to proactively detect known issues within the Veeam backup infrastructure by analyzing the system's event logs, performance data, and configurations. It uses predefined patterns and rules derived from common issues identified by Veeam Support to provide early warnings and suggest corrective actions. This self-service approach enables administrators to address potential problems before they impact operations, enhancing the reliability and efficiency of the backup infrastructure.

The 3-2-1 backup strategy is a best practice that suggests having three total copies of your data, two of which are local but on different devices or media, and one copy offsite. In the described scenario, although there is an offsite component (SOBR with AWS S3 Performance Tier), and a local hardened immutable repository, there is no indication of a second local copy on a different device or media. This means that there is only one local copy of the backup data and one offsite copy. Therefore, the setup does not meet the 3-2-1 best practices requirement, which would involve having at least one more local copy on different media or device.

Veeam ONE is a monitoring and reporting tool for Veeam Backup & Replication, as well as virtual environments like VMware vSphere and Microsoft Hyper-V. In Veeam ONE, you can monitor the capacity of VMware datastores by using the "Infrastructure View". Within this view, there is a specific group for
"Datastores" which provides comprehensive information, including the capacity and free space available on each datastore. This feature is designed to help administrators manage storage effectively and ensure they are alerted before reaching critical capacity limits. The "Infrastructure View" provides a more direct and focused way to monitor resources like datastores compared to "Business View", which is typically used for categorizing and viewing the infrastructure based on business needs, rather than direct resource monitoring.

Explanation
https://helpcenter.veeam.com/docs/agentforwindows/userguide/backup_job_mode.html?ver=60

Explanation
Veeam Backup & Replication allows you to assign information about locations to the following infrastructure objects: Virtual infrastructure objects: vCenter Servers, datacenters, clusters and hosts. Backup infrastructure objects: backup repositories, external repositories, scale-out backup repositories, tape libraries and tape vaults.
Agent management objects: protection groups. Veeam Cloud Connect for service providers: cloud repositories and hardware plans.https://helpcenter.veeam.com/docs/backup/vsphere/locations.html?ver=120