Hey @Rohit_Joshi @kexline4710 @bobthebear @Michael_Mondou @rstrauss Retool is unable to configure our Google OAuth client to allow requests from custom domains. Therefore the Google SSO functionality that Retool provides out of the box on standard, cloud domains (i.e. subdomain.retool.com) is not supported on custom domains.
To have Google SSO on custom domains you'll need to configure a Google OAuth client and integrate it with your Retool instance per Retool's Sign in with Google docs.