Vault cannot be deleted as there are existing resources within the vault – Azure

If you get the following error:

Error Description: Vault cannot be deleted as there are existing resources within the vault. : xxxx.xxxxx.xxxxx Unregister all containers from the vault and then retry to delete vault. For instructions, see https://aka.ms/AB-AA4ecq5 Code: ServiceResourceNotEmptyWithContainerDetails
To make it so you can delete the Recovery Services Vault. Open the Storage Accounts under “Backup Infrastructure” by navigating to, Recovery Vault >- Backup Infrastructure -> Storage Accounts
Then hit the three dots & select delete. Now you will be able to delete the vault that you were trying to delete.