Hello,
When using Zetadocs Express, documents archived to SharePoint are saved to a DATE sub-folder (YYYY-MM-DD) only.
If using Zetadocs Delivery Plus editions, it is possible to change the archive folder location of sent documents (so that the folder name is based on contact ID for example). See here for more info on Zetadocs Delivery and Capture editions available for purchase.
If you are already have a Zetadocs Delivery and/or Capture edition, please contact support@equisys.com for further assistance.
Regards,