Enterprise SSO Extension for iOS

I've built an SSO extension for my app. Now I would like to update the authsrv:login.myhost.com with additional associated domains generated by the MDM.

The video here at 9:10 mark references the MDM associated domain ApplicationAttributes for iOS as the way to go. https://developer.apple.com/videos/play/tech-talks/301/

Is it just a matter of including: com.apple.developer.associated-domains.mdm-managed=YES in the entitlement file for both the app and the extension and having the MDM push down something like this in the profile?

<dict>
   <key>AssociatedDomains</key>
   <array>
      <string>authsrv:login.myhost2.com</string>
   </array>
</dict>

Appreciate any guidance.