We have integrated sign-in with our corporate Azure AD. However, the flow must currently start on our corporate Login Portal with the SauceLabs redirect URL specified as a query string parameter.
There should be a flow that allows the user from the Sauce Labs login screen to select an option to log in with their company SSO. When entering their email address, SL should pick up the domain in the email address and based on the STS manifest that was provided by the admins when setting up SSO, SL should redirect the user to the IDP specified in the manifest file for the given domain, passing SL in the replyURL. This creates a holistic SSO experience for corporate users, removing much confusion around logging in.