Configure the quota listener like this :

<events>
...
<event classname="org.apache.slide.webdav.event.DetailedWebdavEvent" enable="true"/>
<event classname="org.apache.slide.webdav.event.WebdavEvent" enable="true" />
...
<listener classname="org.apache.slide.event.QuotaListener">
  <configuration>
    <path>/files/sharedFolders;/files/homedir</path>
  </configuration>
</listener>
...
</events>
