Autosave behavior with Nextcloud public link editing and pending changes

Hello,

I use ONLYOFFICE Document Server integrated with Nextcloud.

Environment:

  • Nextcloud: 31.0.14
  • ONLYOFFICE Document Server: 9.4.0.1
  • Deployment: Docker / Portainer
  • Use case: editing XLSX files through public shared links in Nextcloud
  • Autosave enabled
  • Co-editing mode: Fast
  • “Keep intermediate versions when editing (forcesave)” was not enabled at the time, but has now been enabled

Question:

How exactly does autosave work when editing a Nextcloud file through ONLYOFFICE?

I had a case where an external user edited an XLSX file through a public link. Later, the final file in Nextcloud did not contain the expected recent changes. Nextcloud versions did not show a version with those changes.

In the logs I found ONLYOFFICE callback/track entries, including “status 2 result 0”, but the final file did not show the expected data.

I would like to understand:

  1. Does autosave mean changes are immediately persisted to the final file in Nextcloud?
  2. If not, where are pending changes stored before the final save?
  3. What happens if Nextcloud is restarted or enters maintenance mode while a document is open?
  4. Can ONLYOFFICE keep a persistent local copy and retry saving to Nextcloud if the callback/save fails?
  5. Is “Keep intermediate versions when editing (forcesave)” the recommended setting to reduce this risk?
  6. Is there a way for admins to see open documents or pending unsaved changes before maintenance?

Expected/suggested improvement:

It would be very helpful if ONLYOFFICE/Nextcloud could warn users and admins when changes are not yet safely persisted to Nextcloud, especially for documents edited through public links.

Thank you.