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.

To roll back the configuration database to Friday's state, the backup administrator should use the
'Restore' mode available in Veeam Backup & Replication. This mode allows for the entire configuration backup to be restored, which includes the job settings and history, and brings the configuration database back to the state it was in at the time of the backup.

To solve the space issue while enabling GFS retention, the engineer should add an Object Storage as a Capacity tier to the Scale-Out Backup Repository (SOBR) and set the policy to move backups that are older than 14 days. This approach allows for efficient use of local NAS storage for short-term retention and leverages object storage for long-term archival purposes.References:Veeam Backup & Replication User Guide, Veeam SOBR Configuration Guide

Veeam Cloud Service Providers (VCSPs) are equipped to offer a range of services designed to extend Veeam's data protection capabilities to the cloud, enhancing the flexibility and reliability of backup and disaster recovery strategies for Veeam's customers. The two service offerings that align with VCSP capabilities are:
A: Backup as a Service (BaaS) - This service allows Veeam customers to offload their on-premises backup operations to the cloud, leveraging cloud resources for storage and management of backups. BaaS simplifies backup processes, reduces the need for extensive on-premises infrastructure, and provides an added layer of data protection and accessibility.
E: Disaster Recovery as a Service (DRaaS) - DRaaS extends beyond basic backup services to offer a more comprehensive disaster recovery solution. It ensures not only the availability of backups but also the capability to rapidly restore and run critical workloads in the cloud in the event of a disaster, minimizing downtime and ensuring business continuity.
These services leverage the robust capabilities of Veeam Backup & Replication, tailored for cloud environments, to offer scalable, efficient, and secure data protection solutions.

Explanation
It is recommended that you use quick rollback if you restore a VM or VM disk after a problem that has occurred at the level of the VM guest OS - for example, there has been an application error or a user has accidentally deleted a file on the VM guest OS "Windows update installation is a OS Problem"