Collaboration on documents is a big issue with Cisco Webex Teams. Can't see anyway for teams to work on a document collaboratively and edit\update it. What Cisco Webex does is make you upload and download copies of the document to make edits. This is highly inefficient and leads to multiple version of documents, with same names, in the Files. A better option would be for team members to work on a 'single' file saved in the cloud that everyone can work on and update.