Azure AD B2B vs B2C: Key Differences and When to Use Each

Azure AD B2B (Business-to-Business) allows organizations to securely share resources with external partners using their existing credentials, while Azure AD B2C (Business-to-Consumer) provides customer identity and access management for consumer-facing applications with customizable sign-up and sign-in experiences.

Quick Comparison

This table summarizes the main differences between Azure AD B2B and B2C.

Feature	Azure AD B2B	Azure AD B2C
Purpose	Collaborate with external business partners	Manage consumer identities for apps
User Type	External employees or partners	Consumers or customers
Authentication	Uses partner's existing credentials	Supports local accounts and social logins
Customization	Limited UI customization	Full branding and user journey customization
Use Case	Access to internal apps and resources	Customer-facing web and mobile apps
Pricing Model	Included with Azure AD licenses	Charged per monthly active user

Key Differences

Azure AD B2B is designed to let organizations invite external users to access their internal resources securely. These external users keep using their own organization's credentials, so no new passwords are needed. This makes collaboration easy and safe without managing separate accounts.

In contrast, Azure AD B2C focuses on managing consumer identities for apps that serve customers directly. It supports creating local accounts with email and password or signing in with social accounts like Google or Facebook. It also allows full customization of the sign-up and sign-in experience to match the app's branding.

While B2B is about sharing internal resources with trusted partners, B2C is about providing a smooth and secure login experience for millions of customers. Pricing also differs: B2B is included with Azure AD licenses, but B2C charges based on active users.

Code Comparison

Here is an example of inviting an external user using Azure AD B2B via Microsoft Graph API in PowerShell.

powershell

Connect-MgGraph -Scopes "User.Invite.All"

$invitation = New-MgInvitation -InvitedUserEmailAddress "[e-mail]" -InviteRedirectUrl "https://myapp.contoso.com" -SendInvitationMessage $true

Write-Output "Invitation sent to: $($invitation.InvitedUserEmailAddress)"

Output

Invitation sent to: [e-mail]

Azure AD B2C Equivalent

Here is an example of creating a user in Azure AD B2C using Microsoft Graph API with a local account in JSON format.

json

{
  "accountEnabled": true,
  "displayName": "John Doe",
  "identities": [
    {
      "signInType": "emailAddress",
      "issuer": "contoso.onmicrosoft.com",
      "issuerAssignedId": "[e-mail]"
    }
  ],
  "passwordProfile": {
    "password": "P@ssw0rd1234",
    "forceChangePasswordNextSignIn": false
  },
  "passwordPolicies": "DisablePasswordExpiration"
}

Output

User John Doe created with local email sign-in

When to Use Which

Choose Azure AD B2B when you want to securely share your organization's internal apps or resources with external business partners who already have their own Azure AD or Microsoft accounts. It simplifies collaboration without managing new user credentials.

Choose Azure AD B2C when you build consumer-facing applications that require managing millions of customer identities with flexible sign-up, sign-in, and profile management options, including social logins and full UI customization.

Key Takeaways

Azure AD B2B is for external partner collaboration using their existing credentials.

Azure AD B2C manages consumer identities with customizable sign-in experiences.

B2B is included with Azure AD licenses; B2C charges per active user.

Use B2B for secure access to internal resources by partners.

Use B2C for customer-facing apps needing flexible authentication options.