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= [wiki:help/en Cyberduck Help] / [wiki:help/en/howto Howto] / [wiki:help/en/howto/mount 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 [wiki:help/en/howto/webdav 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.

=== References ===
 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."

 * [https://support.microsoft.com/en-us/help/211632/description-of-how-word-creates-temporary-files Description of how Word creates temporary files]
 * [https://support.microsoft.com/en-us/help/313472/the-document-is-locked-for-editing-by-another-user-error-message-when The document is locked for editing by another user error message when you try to open a document in Word]

== Preferences ==