Seeking help getting Owncloud to work after upgrading OS X to 10.11.x

Coming from https://central.owncloud.org/t/adjusting-the-server-for-el-capitans-aontacts-app/1533 some additional info. You need to have a correct setup of this URLs:

https://doc.owncloud.org/server/9.1/admin_manual/issues/general_troubleshooting.html#service-discovery

Everything else is in the "hand" of Apple