As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.
The possibility to edit a document through co-editing: several people working on the same document at the same time.
You have available a solution: https://www.onlyoffice.com/
I hope this can help!
Cheers.