GOOGLE PORTAL:
Create Google SAML App
Apps > Web and Mobile Apps > Add App > Add Custom SAML App:
Copy and save the following items:
- Entity ID
- SSO URL
- Certificate
Do not close current browser tab with Google Admin Console.
MIST DASHBOARD
Navigate to Organization > Settings > Single Sign-On > Add IdP
Paste previously copied Entity ID, Certificate and SSO URL as outlined in the screenshot below: