Email-verified environments lack the full capabilities of domain-verified environments, particularly when integrating with third-party Identity Providers (IdPs). To integrate with an external IdP like Okta or Azure AD, you must first verify the domain to ensure secure and authenticated access.

Verified Answer from Official Source:

The correct answer is verified from the Google Workspace SSO Configuration Guide, which specifies that domain verification is a prerequisite for setting up SSO and integrating with third-party IdPs.

'Domain verification is required before you can integrate third-party Identity Providers (IdPs) for SSO within the Admin console.'

Without domain verification, the system does not have the necessary trust and authentication measures in place to delegate login processes to external providers.

Objectives:

Integrate ChromeOS with third-party SSO solutions.

Ensure domain verification before setting up SSO.

Google Workspace SSO Configuration Guide