I am running my own Identity Provider with ADFS, and do not want the Active Directory integration with it. When a user logs into the page, I don't want the user to see the "sign in with one of these accounts" page, and instead would like it to just default to the other provider. I noticed I cannot disable the Active Directory provider in the trusted providers page.
Some of the resources I have found, talk about adjusting the actual login page js, or code file to get it to trick the page into selecting the one I want to default. I REALLY do not want to do this, and it seems like this should be a simple option somewhere.
So I did eventually figure this out. The proper way to remove Active Directory from the choice list does NOT involve adjusting js files. Going into the system and running:
Set-ADFSProperty -EnableLocalAuthenticationTypes $false
This then used the only other identity provider automatically.