Azure AD B2C Migration Policy Analyzer Now GA

Introduction

Microsoft has released the Migration Policy Analyzer as generally available for organizations planning a move from Azure AD B2C to Microsoft Entra External ID. For IT teams managing complex customer identity environments, this matters because migration planning often starts with a difficult question: what exactly is implemented today?

What's new

The Migration Policy Analyzer is now available through the Identity Experience Framework (IEF) in Azure AD B2C and can analyze custom policy definitions without requiring policy changes.

Key capabilities include:

• Creating an inventory of authentication features used in Azure AD B2C custom policies
• Identifying migration paths to Microsoft Entra External ID
• Highlighting scenarios that may require custom development
• Flagging cases where an architectural redesign may be recommended
• Categorizing findings by migration readiness

The readiness categories in the report are:

• Available – supported with existing Entra External ID functionality
• Requires Custom Development – may need APIs, extensibility, or partner solutions
• Architecture Change Recommended – better handled with a different implementation pattern
• Not Currently Supported – no direct migration path today

How it works

Microsoft says the assessment can be generated in three steps:

1. Open Identity Experience Framework in your Azure AD B2C tenant
2. Select a policy and choose Analyze policy
3. Review and download the migration assessment report

This is a deterministic analysis of custom policies within IEF only. It is not a full tenant-wide scan, so admins should understand that the output reflects what is defined in those custom policy files.

Why this matters for IT admins

For identity architects and administrators, the biggest benefit is reduced manual review effort. Many Azure AD B2C environments have grown over time to include social federation, claims transformations, REST API integrations, and custom sign-in or password reset journeys. Manually tracing those dependencies can slow migration planning significantly.

With a structured report, teams can more quickly:

• Estimate migration scope and effort
• Prioritize proof-of-concept work
• Identify features that need redesign
• Build a phased migration strategy
• Align technical and business stakeholders earlier

Next steps

If your organization is considering a transition from Azure AD B2C to Microsoft Entra External ID, run the analyzer now to establish a baseline.

Recommended actions:

• Review your existing custom policies in IEF
• Run the Migration Policy Analyzer on key user journeys
• Share the report with architects, developers, and project stakeholders
• Use the findings to map low-risk versus high-effort migration areas

The GA release gives Entra administrators a faster way to move from discovery to an actionable migration plan with less guesswork and lower project risk.