SC-100 Certification Practice Question #100

Question

You have a Microsoft Entra tenant named contoso.com.

You have an external partner that has a Microsoft Entra tenant named fabnkam.com.

You need to recommend an identity governance solution for contoso.com that meets the following requirements:

•	Enables the users in contoso.com and fabrikam.com to communicate by using shared Microsoft Teams channels
•	Manages access to shared Teams channels in contoso.com by using groups in fabrikam.com
•	Supports single sign-on (SSO)
•	Minimizes administrative effort
•	Maximizes security

What should you include in the recommendation?

Accepted Answer

Only B2B direct connect satisfies all five requirements simultaneously: it is the single Microsoft Entra External ID feature that powers Teams Connect shared channels, it gives users SSO with their home (fabrikam.com) credentials without creating guest accounts (minimizing admin effort and maximizing security via mutual trust), and cross-tenant access inbound settings can scope sharing to specific groups from the external tenant. B2B collaboration (the main dissent) would require provisioning guest objects and does not deliver shared-channel SSO, so it fails the SSO and minimize-effort criteria. Confidence is held at 89 rather than higher because a few community members voted B and the "manage by using groups in fabrikam.com" wording is what makes direct connect's group-scoped inbound trust the decisive differentiator.

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