Third-party credentials for Meraki MR's splash page

[Hiroki1]

Google authentication is set in the third party credentials on the splash page.
Google has a SAML integration with Azure AD and redirects to the Microsoft page on wireless connection.
I set this up by referring to the following URL.

https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Walled_Garden

I am redirected to the Microsoft page, but I cannot sign in. I think it is because I don't have enough domain to set in Walled garden.
What should I add for the domain to allow authentication with Azure AD?

[Inderdeep]

@Hiroki1 : Did you check the below link

https://documentation.meraki.com/MR/MR_Splash_Page/Google_Sign-In

[Hiroki1]

That link has already been checked and configured.

What I want to know is the configuration parameters for Walled Garden when authenticating with a Google account that is SAML linked to AzureAD.