The nstinfo and mminfo commands can be used to locate the bootstrap SSID on a backup volume. The other commands are not related to this task.

In a NetWorker environment, the daily scheduled backup will fail if there are no appendable volumes that match the pool. This can happen if all the volumes in the pool have already been used up, and there are no new volumes to append the data to.

NMDA, or NetWorker Module for Databases and Applications, must be installed on the Hyper-V hosts in order to back up the hosted Virtual Machines. NMDA is a specialized NetWorker client that provides support for databases and applications such as Microsoft Exchange, Hyper-V, and Oracle.

The steps to resolve the issue of the client "ClientAB" not being in the backup server's clients list are as follows:
Verify the client name:
On the NetWorker server, open the NetWorker Management Console.
Go to the Clients tab.
Verify that the client "ClientA" is present in the list of clients.
Verify that the client "ClientAB" is not present in the list of clients.
Update the client name:
On the NetWorker server, open the NetWorker Management Console.
Go to the Clients tab.
Click on the ClientA.
In the Client Name field, update the name to "ClientAB"
In the Client Address field, enter the IP address or hostname of the client.
Click on the OK button to save the changes.
Re-schedule the backup
Go to the Clients tab.
Click on the ClientAB.
Go to the Schedules tab.
Remove the current schedule and create a new schedule for the client.
Select the appropriate schedule for the backup.
In the Save Set field, select the save set that you need to backup.
Click on the OK button to schedule the backup.
Monitor the backup process
Monitor the backup process to ensure that it is running successfully.
Check the logs for any errors.

A Complete Data Protection Suite as Infrastructure-as-a-Service (IaaS) would meet all the objectives of the customer.
NetWorker Virtual Edition is a backup solution for virtualized environments, and it allows to backup virtual machines and virtual applications. CloudBoost virtual is a feature that allows the user to perform backups and recoveries to and from a cloud-based object store.
On-prem NetWorker with CloudBoost Virtual Appliance to improve recovery time objectives is also a good solution.
Complete Data Protection Suite as IaaS includes NetWorker, CloudBoost, and other Dell EMC Data Protection solutions and it allows the customer to:
Greater efficiency with virtualized and pooled resources
IT resources can be provisioned on-demand and easily returned to the resource pool Quickly allocate computing resources to meet business demands Enhanced security and protection of information assets