MIM 2016 Sunset Guide

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Microsoft has published a definitive retirement schedule for Microsoft Identity Manager (MIM)¹, yet the product’s slow phase-out reflects a deeper reality. While Microsoft moved decisively towards cloud-native identity with Microsoft Entra, many enterprises remain anchored to MIM due to its deep integration with legacy systems.

Each milestone towards full retirement further erodes functionality and support, forcing security teams to shoulder more operational risk and technical debt the longer they stay on‑prem. MIM is no longer evolving, meaning no new features, no architectural modernization, and no innovation. Every year spent clinging to MIM increases technical debt, drains resources, and blocks modernization efforts across identity, security, and application delivery.

The impact isn’t isolated. MIM’s aging sync engine can delay critical updates, hinder cloud adoption and digital transformation initiatives, inflate IAM budgets, and introduce vulnerabilities that ripple across systems. As more critical systems move to the cloud, MIM becomes not just a relic but a roadblock.