ownCloud Sync Client Finder Extension

Hi Jamf Nation

I'm trying to enable the Finder Extension for the ownCloud Sync Client, but the command does not work for all users. What I tried so far:

#!/bin/sh

    user=`ps aux | grep Finder.app | grep CoreServices | awk '{print $1}' | sort | uniq`

    sudo -u $user pluginkit -e use -i com.owncloud.desktopclient.FinderSyncExt

exit 0

But it does not work. Any Ideas?