You can update files by check out and check in. When you check out a file, the file is locked, and no other user will be able to upload a newer version (overwrite the file). When you check in the file, you will be prompted to upload a newer version to replace the original file. The file, after being checked in, will be available for other users to check out again. If you do not want to upload a new version, you can undo the check out.
To update a file, you must first enable Document Control Management in the Control Panel.
is requesting access to a wiki that you have locked: http://my.axerosolutions.com/spaces/5/communifire-documentation/wiki/view/21088/update-file