# microsoft-entra-external-id

Source: https://startwithidentity.com/vendors/ciam/microsoft-entra-external-id/
Last updated: 2026-07-13
License: content by Start with Identity. Cite the source URL.

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## Overview

Microsoft Entra External ID is Microsoft's [CIAM](https://startwithidentity.com/guides/fundamentals/what-is-ciam/) product for external identities: customers, partners, and other users outside the organization. It is the successor to and consolidation of Azure AD B2C and the external-collaboration (B2B) capabilities, and it is distinct from [Microsoft Entra ID](https://startwithidentity.com/vendors/iam/microsoft-entra/), which is the workforce identity platform, and from Active Directory, which is the on-premises directory. For organizations already standardized on Microsoft, External ID keeps customer identity within the same cloud, security tooling, and compliance boundary as the rest of their estate.

## What it is good at

Ecosystem fit and reach are the core strengths. External ID supports [OpenID Connect](https://startwithidentity.com/standards/openid-connect/), [SAML 2.0](https://startwithidentity.com/standards/saml-2-0/), social identity providers, and passwordless methods including passkeys ([WebAuthn/FIDO2](https://startwithidentity.com/standards/webauthn-fido2/)) and Microsoft Authenticator, and it plugs into Conditional Access, Identity Protection risk signals, and Microsoft's compliance certifications. Custom user flows let teams brand and shape sign-up and sign-in, and running on Azure means the same monitoring, governance, and data-residency options as the rest of a Microsoft deployment. Backed by Microsoft's support ecosystem, it is a safe institutional choice for Microsoft-aligned enterprises.

## Where it falls short

Developer experience is the historical weak point. The Azure AD B2C lineage was known for complex custom policies and a steep learning curve, and while External ID modernizes the model, it is still more involved than the drop-in experience of developer-first CIAM tools. The value is strongest inside the Microsoft ecosystem; teams on non-Microsoft stacks get less benefit and more friction. Authorization and lifecycle features are lighter than dedicated tools, and pricing, while published and MAU-based, sits within Azure's broader billing model.

## Pricing

Monthly-active-user pricing with a free tier, billed through Azure. Costs scale with active customer identities and the features used (for example, premium add-ons). Model expected MAUs and compare against per-MAU CIAM competitors, since cost curves diverge as a customer base grows.

## Best for, and who should look elsewhere

Choose Entra External ID when you are a Microsoft-aligned enterprise extending identity to customers or partners and want that identity inside the same Azure security and compliance model. Look elsewhere if your stack is not Microsoft-centric or you want the fastest developer experience: compare [Auth0](https://startwithidentity.com/vendors/ciam/auth0/) for a broad vendor-neutral platform, [Amazon Cognito](https://startwithidentity.com/vendors/ciam/amazon-cognito/) for AWS-native scale, and the [best CIAM platforms](https://startwithidentity.com/rankings/best-ciam-platforms/) ranking for the wider field.

## Bottom line

Microsoft's customer identity product, strongest for enterprises already on Microsoft who want CIAM within their existing cloud and compliance boundary. Capable and well-supported, with a developer experience that trails the CIAM specialists. See it in context in our [enterprise CIAM for passwordless and passkeys](https://startwithidentity.com/articles/top-5-enterprise-ciam-passwordless-passkeys/) and [enterprise CIAM for scale and security](https://startwithidentity.com/articles/top-7-enterprise-ciam-scale-security/) comparisons.