To finalize a replica failback, the 'Commit Failback' procedure is used. This process ensures that the failback is fully completed and that the environment is returned to its original state prior to the failover.

The full backup in a backup copy job for each GFS retention point is created on the day that the full backup is scheduled. This ensures that the backup copy job aligns with the specified schedule for creating and retaining full backups at designated points in time.

SQL Server Standard or a higher version should be deployed for the instance used by Veeam Backup & Replication instead of the SQL Server Express instance installed by default in large-scale environments. SQL Server Express has limitations on the database size, the amount of memory it can utilize, and the number of CPU cores it can use. For large-scale environments, these limitations can hinder performance and scalability, necessitating the use of the more capable SQL Server Standard or higher versions.

For an optimal configuration in a Veeam backup environment involving a remote repository, you need to deploy the Veeam Data Mover service both at the production site and at the remote target site. This setup ensures efficient data transfer by having a dedicated service to handle data read at the production site and another to manage data write at the remote site. This dual deployment minimizes network load and optimizes the backup process.

The described backup method is a 'forever forward incremental backup'. In this method, after an initial full backup, all subsequent backups are incremental, meaning they only record the data blocks that have changed since the last backup. These changes are then merged into the original full backup file to reconstruct the latest state of the virtual machine.