There have been a few folk working on getting the Pi 3B+ to run IOT but some driver issues still existed late last year with some files on GITHUB to get the box to boot.
You have to remember that this is IOT Core and you effectively dedicate the box to that app. If that’s what you are looking to do, then I would consider one of the thin client boots such as http://rpitc.blogspot.com
or ‘pro’ versions such as https://www.clearcube.com/raspberry-pi-thin-client/
Wonder where do you stand with licences for this? Some thin clients I used came with a CAL for the server as part of the price, others where covered by either server limits or user based ones
Always was a pain keeping track
Need Pi spray - these things are breeding in my house...