When I press the voice control button on the steering wheel the infotainment system will automatically reduce the speed of the fan presumable so I can be heard.
When I make a call through the infotainment system it does not reduce the fan.

Anyone know if this is a configurable item?

 

I've been through the menus and I haven't found any such option. if the fan is running hard on auto, I usually just up or lower the temp to reduce fan speed temporarily, or take it off auto.