Cyberduck Mountain Duck CLI

Version 15 (modified by dkocher, on Feb 17, 2020 at 8:03:03 PM) (diff)


Cyberduck Help / Howto / Mountain Duck / File Locking

Preliminary documentation. Version 3.4 or later required

Mountain Duck supports locking files to prevent conflicting edits from others while a document is open in a editor.

Lock Support in WebDAV

WebDAV supports locking files on the server. Mountain Duck locks files on the server when opened in a editor. This prevents other users from modifying the document until the file is closed by the user.

Pseudo locking for protocols with no native lock support using lock owner files

For connections other than WebDAV, we support detecting files opened by others by looking for owner lock files uploaded to the server.

Note: Support is currently limited to files edited in Microsoft Word, Microsoft Excel and Microsoft Powerpoint on macOS and Windows.


When a previously saved file is opened for editing, for printing, or for review, Word creates a temporary file that has a .doc file name extension. This file name extension begins with a tilde (~) that is followed by a dollar sign ($) that is followed by the remainder of the original file name. This temporary file holds the logon name of person who opens the file. This temporary file is called the "owner file."

Error message when opening locked document

Attempting to open a locked document, an error message is displayed notifying the document can only be opened in read only mode.

Microsoft Word (Windows)

This file is already opened by another user. Would you like to make a copy of this file for your use?

Microsoft Word (macOS)


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