• In NSX-T versions prior to 2.5.1, backups are configured, but never complete, cluster back shows "Cluster Backup in Progress".
• If the manager is restarted, the backup is stopped and on the next scheduled backup, it will start again and never complete, with same status "Cluster Backup in Progress".
• On demand back will also start and never complete, with the same status "Cluster Backup in Progress".
• The "Cluster Backups" section shows "Status Failed", with the error message "backup operation unknown error".
• Below is a screenshot of the status and on screen:

• On the NSX-T manager which is the VIP leader, you should see the following errors in this log:

• Here we can see the start of the password prompt for the SFTP backup user, in this case "nsxadmin" with only "pass"

[email protected]'s pass

• In the next few lines you should see the second part of the password request "word":

2020-04-23T12:00:10.783Z napi.root.node.file-store.utils ERROR Unexpected ssh output: word: