Guest Access with Microsoft Entra B2B Collaboration

What Microsoft Entra B2B collaboration is

Microsoft Entra B2B collaboration (formerly Azure Active Directory B2B) is a capability within external identities that allows organizations to securely share applications and corporate resources with external business partners and guest users from any other organization.

How it meets the requirements

• External credential sign-in: External users authenticate using their existing corporate credentials, Microsoft accounts, or federated identities, eliminating the need to issue or manage separate passwords.
• Access and security governance: The host organization maintains complete control over corporate data by enforcing Conditional Access policies, such as requiring multifactor authentication (MFA) at the tenant or application level for guest users.
• Lifecycle and permission management: Administrators or delegated application owners can add guest users, assign them to specific security groups, and revoke permissions at any time.

Key advantages and capabilities

• Seamless collaboration: Guests sign in through their home organization's identity provider while accessing authorized host resources.
• Delegated access management: Group and application owners can invite and manage guests directly without administrative intervention.
• Granular security controls: Organizations can define inbound and outbound cross-tenant access settings and block specific domains.
• Reduced administrative overhead: Organizations avoid creating and managing secondary credentials for external staff.

Why this is optimal

Microsoft Entra B2B collaboration provides the exact balance of frictionless cross-organizational sharing and centralized security governance required when working with external partners.