The Documents application supports editing documents within ownCloud, without the need to launch an external application. The Documents app supports these features:
Supported file formats are .odt, .doc, and .docx. .odt is supported natively in ownCloud, and you must have LibreOffice or OpenOffice installed on the ownCloud server to convert .doc, and .docx documents.
Go to your Apps page and click the Enable button. You also have the option to grant access to the Documents apps to selected user groups. By default it is available to all groups.
See “Collaborative Document Editing” in the User manual to learn how to create and share documents in the Documents application.
Go to your admin settings menu. After choosing Local or External click on the Apply and test button. If you have a working LibreOffice or OpenOffice installation a green Saved icon should appear.
If the mentioned test fails please make sure that:
More hints why the test is failing can be found in your data/owncloud.log.