Ive used APT for over 3 years but don’t use auto focus routine
Might be prudent to post on the APT forum ( been a member since day 1 ) as Ivo the developer or other folk generally respond in a timely manner.I’ve solved most of my APT issues via the forum
Don’t know if too many folk use APT on IIS , maybe a few ( Drac0 ) but not many
https://aptforum.com/phpbb/
Good luck with it
Cheers
Martin