The _WatchDocumentService_ component allows users to watch/unwatch a document. If they are watching the document, they will receive a notification mail when there are any changes on the document.
The configuration of this component is found in _/core/core-configuration/src/main/webapp/WEB-INF/conf/wcm-core/core-services-configuration.xml_.

{code:xml}
<component>
  <key>org.exoplatform.services.cms.watch.WatchDocumentService</key>
  <type>org.exoplatform.services.cms.watch.impl.WatchDocumentServiceImpl</type>
  <init-params>
    <object-param>
      <name>messageConfig</name>
      <description>description</description>
      <object type="org.exoplatform.services.cms.watch.impl.MessageConfig">
        <field  name="sender"><string>support@exoplatform.com</string></field>
        <field  name="subject"><string>Your watching document is changed</string></field>
        <field  name="content">
          <string>The document that you are watching is changed.
          Please go to ecm to see this change
          </string>
        </field>
      </object>
    </object-param>
  </init-params>
</component>
{code}

*Details*:

*Object type:* _org.exoplatform.services.cms.watch.impl.MessageConfig_

||*Field name*||*Type*||*Default value*||*Description*||
|*sender* |string|support@exoplatform.com|The sender who sends the notification mail.|
|*subject* |string|Your watching document is changed.|The subject of the notification mail.|
|*content* |string|The document that you are watching is changed. Please go to ecm to see this change.|The content of the notification mail. |
