@user223344 I just saw, that, albeit not listet as new firmware in the OCC, there is a 5.1.0 for the EAP245 v3 available and I did a manual upgrade. After that upgrade the feature worked perfectly...

@user223344 I have tried to do the same just now with EAP245v3 und current firmware as well as with EAP610 and 610Outdoor, in neither case the Radius Server is contacted. I have also failed locating...