This knowledge base article addresses the issue of a selected VM not being found on the ESXi host within BDRSuite Backup Server/BDRSuite Client. The error may arise due to various causes, such as invalid ESXi/vCenter Server credentials, deletion of the backed-up VM, unavailability of a VM for 'Disk Level Recovery,' and connectivity issues.

Cause 1: Invalid ESXi/vCenter Server Credentials

Ensure the ESXi/vCenter Server credentials are accurate. If credentials are changed after saving the host, update them in the BDRSuite Server settings.

Cause 2: Deleted/Removed VM Configured for Backup

Confirm the selected VM exists on the target host. If the VM is deleted/removed from the ESXi/vCenter Server, backups will fail.

To resolve, edit the corresponding backup job:

1. Log in to the BDRSuite Backup Server.
2. Navigate to Backup -> List Backup Jobs.
3. Click the 'Edit' icon under the 'Actions' column for the relevant backup job.
   

For BDRSuite v5.3 and above:

4. Refresh the host on the Host/VM Selection page by clicking the "+" icon to expand the host. This action auto-refreshes the list of available VMs. Save the backup configuration.

For BDRSuite v5.2 and below:

5. Manually remove VMs on the Host/VM Selection page by clicking the "+" icon to expand the host. Then save the backup configuration.
   
6. Backup data from deleted VMs is retained based on configured retention policies.
   

Cause 3: Unavailable VM for Disk Level Recovery

Ensure the selected VM intended for attaching backed-up disks is present on the target host.

Cause 4: Connectivity Issue

1. Verify the accuracy of the target ESXi/vCenter Server's IP address.
2. Confirm the target host's accessibility/connection through the designated port.