...
If you click on the “Finished Envelopes” button you can see that the backup is prepared.
While collecting all envelopes on the server for the backup (which may take up to several hours), following Text will be displayed:
Your backup is queued and will be started soon. You will receive an email once your backup is ready for download.
If you e.g. have been logged in in several browsers while requesting the backup, or request the backup at the same time as another user does, the text might not yet be visible while the backup process is already in progress. If you press the button to start a backup process, an error message informing that you "tried to schedule a backup operation while another one is already in progress" will be shown.
Once the backup was completed, is ready you will receive an email to download the backup. The backup is then available for 48 hours to be downloaded.
Automatic Remote Signature Profiles 
...