While deleting vault select to keep backups stored in the vault.
This article applies to:
You have successfully installed a Backup Client, but registration failed and machine does not appear in Backup Management Console.
Or you need to re-register a client machine to another Backup Account.
(!) IMPORTANT: This method is NOT supported for registration of Agent for VMware (Windows)
Use this method to manually register a Backup Client.
Use quotation marks, if your password contains special characters or spaces.