This describes how to get your RoundCube 0.9.5 instance embedded into your ownCloud 6.x installation. You would this primarily as a convenience for heavy ownCloud users, so they don't need to leave ownCloud to interact with their webmail client.

On Your Server:

In a Debian installation, that looks like this

$ sudo chown -R www-data:www-data /var/www/owncloud/apps/roundcube

Inside ownCloud's Web Interface

Log into RoundCube Mail inside ownCloud

You should now see the app logging you in and after a few seconds, hey presto, there's your RoundCube session inside ownCloud.

ownCloud RoundCube