Hey @Wilco_Havenaar,
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Just to verify here, Roon is stuck during the identification process? Can you click on the spinner in the upper-right and share a screenshot of what you see?
Thanks!
Dylan