Are there any additional requirements to run this on IIS? I have URL rewrite installed, and what I think are the correct settings in Azure. When I hit "submit" on the idp config section in osTicket, it takes me to the Microsoft O365 auth page, then "permissions requested", I hit accept, then get immediately bounced back to the web server with a 404 - File or Directory not found. The url looks to contain a fully formed auth token too. Any pointers on what to check here, I'm a little stuck.