In Veeam Backup & Replication, to utilize AWS S3 Glacier for long-term storage, the AWS S3 must first be added as a Capacity Tier within the Scale-Out Backup Repository (SOBR). This step is necessary before backups can be moved to Glacier. Once S3 is established as the Capacity Tier, the policies for moving backups to Glacier can be configured based on the retention requirements (in this case, after 90 days). This approach ensures that the monthly full backups are initially stored in S3 and thenoffloaded to Glacier for cost-effective long-term retention.References:
* Veeam Documentation: Scale-Out Backup Repository
* Veeam Help Center: AWS S3 as Capacity Tier and Archive Tier Configuration

After using Instant VM Recovery to bring a critical crashed server back online quickly, the final step required to complete the recovery process is A: Migrate to production. Instant VM Recovery allows a VM to run directly from the backup file in a temporary location, enabling rapid recovery and minimal downtime.
However, because the VM is running in this provisional state, it's essential to migrate it back to the production environment to ensure long-term stability and performance. The "Migrate to production" operation involves moving the running VM from the backup storage to the production storage, typically involving a storage vMotion in VMware environments or a similar process in other hypervisors. This step ensures that the VM is fully restored to its original or a new production environment, solidifying the recovery and allowing the VM to operate as part of the normal infrastructure once again.

Explanation
https://helpcenter.veeam.com/docs/backup/vsphere/instant_disk_recovery.html?ver=100

Explanation
https://helpcenter.veeam.com/docs/agentforwindows/userguide/backup_chain.html?ver=40

To ensure that applications can be started in a specific order in advance of a disaster, an administrator should use a Failover Plan in Veeam Backup and Replication. This feature allows for the creation of a predefined sequence for starting up VMs, ensuring that applications are brought online in the correct order during a disaster recovery scenario.References:Veeam Backup & Replication User Guide, Veeam Failover Plan Configuration Guide