Hi, I have configured WebDAV with Apache2 on a Ubuntu machine using the mods dav, dav_fs and dav_lock. Connecting to WebDAV folders works fine, from both Windows and Linux clients. Even writing, modifying and deleting documents is possible. Then only problem is when I try to save documents from Microsoft Word 2016. Word first creates the file on the server, but then following error appears: There has been a network or file permission error. The network connection may be lost https://support.microsoft.com/en-us/help/291156/you-receive-a-there-has-been-a-network-or-file-permission-error--the-n (Solutions there don't help) error.log: Could not DELETE /pinakos/admin/66AEE86C.tmp due to a failed precondition (e.g. locks). [423, #0] This resource is locked and an "If:" header was not supplied to allow access to the resource. [423, #0] Could not MOVE /pinakos/admin/6A71E678.tmp due to a failed precondition on the source (e.g. locks). [424, #0] An error occurred on another resource, preventing the requested operation on this resource. [424, #0] Could not DELETE /pinakos/admin/6A71E678.tmp due to a failed precondition (e.g. locks). [423, #0] This resource is locked and an "If:" header was not supplied to allow access to the resource. [423, #0] Virtual host (excerpt): Alias /pinakos/admin /var/www/webdav/pinakos/admin <Directory /var/www/webdav/pinakos/admin> DAV On AuthType Digest AuthName "webdav" AuthUserFile /etc/apache2/users.password Require valid-user </Directory> <Location /pinakos/admin> Require user admin </Location> www-data has rw permissions for /var/www as well for the DavLock file. Best regards, Christian --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx