Modern Auth with Skype for Business 2015

Hi,

I was wondering if there any newer documentation on how to setup Modern Auth with Skype For Business 2015?  I was reading this article:

https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__techcommunity.microsoft.com_blog_skype-5Ffor-5Fbusiness-5Fblog_hybrid-2Dmodern-2Dauthentication-2Dfor-2Dskype-2Dfor-2Dbusiness_134751%26d%3DDwMFaQ%26c%3Ddwr0MjUrBqJCVHlZWcv1jg%26r%3DSKZxpzlmCJtnX1r1i1rE0KA4J4E6CkOA7kO_Idr5xrc%26m%3DSNabNm9tBTuQXwR2yhaoP9LPv4iKg7FLz7IZliin7Qu09un5jv0AVZVTHIO8s6MT%26s%3DBFSutEkHn-T-b92xusRwulnTjtzDrPgbx6tSdJRKl7k%26e%3D&data=05%7C02%7Callen%40sd69.bc.ca%7C3c048228a14945f0c70108dda1fa80ed%7C3280d4c237e747f9bb72057a43679c07%7C0%7C0%7C638844819604218028%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=SjXgBqzeID1IoE99hcdyG1RtEHdXdTdDV%2BtNqlV9u3k%3D&reserved=0

But it points to AppID that doesn't exist in our tenant.