We install our system at our customers sites, but do not control or own their equipment, etc. So the customers would have to know enough about webservers and such, or we would have to support and maintain their webserver, which our tech support isn’t going to do, not to mention that some of our customers are colleges and universities that absolutely would object to us setting up a webserver… So things like utilizing the webhooks, or setting up a server that only handles the authorization redirect, are not practical.
We got around this issue by putting a generic page on our company’s website that simply responds to the redirect, and we grab the code from the redirect URL from an internal webbrowser window… At least we’re not sending our customers to a non-existent page, and we can make it look professional.