How can I disable any future edits to user stories by any user ?
Thank you for your question. There isn't currently a way to lock a story, or to prevent it from being edited. We have received requests for this in the past, but are not currently planning on implementing it. You can view the request here https://ideas.rallydev.com/ideas/D1002 to add your votes and comments to it. I'm sorry for any issues that this may cause.