Simultaneous working is not possible. The file will be locked when someone is editing it. 0ther users will be able to read only. If the file is on a shared network drive this allows different editors at different times.

The editor will have to close the file before anyone else can edit.

This no refresh of read only files except to close and reopen.

If a file becomes locked you can delete the lock file in the same folder as the file.

I also suggest you have a manual version control process where the current version has a constant file name. This ensures hyperlinks from maps and other places access the current map. Make sure all users have the MindManager Tools > 0ptions > Auto backup turned on. That way you can at least go back one version.

I have a question about MindManager. I would like to ask if it is possible to work in one group at the same mind map. We have the same server. But how can we work together at the same map?