Thanks, @Brian Pribe. The doc link is useful, although the title "Legacy" implies it may no longer be relevant. I actually had it under

_historian

- it was setup like that by default. I can select the values in the timescale DB too. I'm just not seeing anything in the management console. This is the topic name generated using the OPC UA connector:

umh/v1/Balluff/Neuhausen/SWE/umh-test1/cmtk/_historian/Root/Objects/IOLinkMasterSet/CMTK_Master1/Port1/264961/ParameterSet/ProcessDataInput

Just for fun, I posted some data directly to MQTT from a device. The validator says the topic is OK (

umh/v1/Balluff/Neuhausen/SWE/umh-test1/cmtk/_historian/Root/Port1/ProcessDataInput

), but the tag browser still doesn't like me. I'm wondering if it is a network problem. The VM is not visible from the Internet, but can get out.