I'm trying to set up AAD with Okta, and find that when users visit the App Embed link and it posts their SAML response to https://login.microsoftonline.com/login.srf, they get an unhelpful error:
AADSTS50107: Requested federation realm object 'http://okta.com/..............' does not exist
I already set up an external identity provider. How do I get it to recognize my domain?