The MIM to Entra ID modernization workbook
This is a practical workbook for mapping your current MIM estate, identifying dependencies, and planning a staged move towards Microsoft Entra ID.
Learn how to migrate in stages without breaking production.
Map identity outcomes, not functionality in MIM
Instead of asking what replaces MIM, this workbook helps you answer which identity outcome you should improve first. When the MIM to Entra ID migration is framed as a platform replacement, the scope quickly expands: All workflows, portals, exceptions, and AD dependencies become part of the same project.
The goal is to prepare for a real first-wave decision.
After working through the questions in the workbook, you should be able to:
Who is the workbook for?
This workbook is written for CIOs, CISOs, IT directors, identity leaders, Microsoft platform owners, infrastructure teams, security architects, and IAM teams involved in MIM to Entra ID planning.
Assess your MIM
Use the workbook to start assessing your current MIM environment and dependencies.
Practical tools included:
The workbook contains a set of checklists with practical, hands-on questions that help you map your current environment and assess what outcome should be your first wave.
Why Fortytwo and Identity Universe
Fortytwo starts a migration from MIM by asking what the business depends on identity for, then working backwards to the first wave that can reduce risk and create visible control.
During the transition, MIM remains operational while selected identity outcomes move into a modern model based on Microsoft Entra ID and Fortytwo Identity Universe, which provides a governance layer. This allows you to modernize identity in controlled waves rather than forcing everything into a single high-risk cutover.
Use the guide to prioritize
Get help structuring and assessing your MIM, enabling you to establish a migration pattern and start your first wave.
FAQ
What is the MIM to Entra ID Modernization Workbook?
It is a practical planning workbook for organizations running Microsoft Identity Manager that want to move toward Microsoft Entra ID and Identity Universe without starting with a big-bang migration.
Who should use the workbook?
The workbook is designed for CIOs, CISOs, IT directors, identity leaders, Microsoft platform owners, and IAM teams responsible for reducing MIM dependency while keeping identity operations stable.
What if we still need Active Directory? Does that rule out Entra?
No. Most enterprise environments need AD for a period. Fortytwo’s model explicitly handles hybrid coexistence and the writeback decision. We help you identify which AD dependencies are real, which can be modernised quickly, and how to sequence the program accordingly.
What problem does the workbook solve?
It helps organizations move from vague MIM replacement discussions to a concrete first-wave plan based on current-state mapping, outcome prioritization, coexistence authority, writeback decisions, evidence, and rollback readiness.
What’s the difference between Fortytwo’s approach and what a large SI would offer?
Focus and accountability. Large integrators use identity as one workstream among many. We run identity as our focus. That means deeper knowledge of the MIM environment, faster time to first delivery, and a model that’s designed to be steerable, not just technically sound.
Does the workbook require a full migration commitment?
No. It is designed to help organizations identify one realistic first wave before committing to a larger migration program.
How does Identity Universe fit into MIM migration?
Identity Universe is the governance layer for moving identity outcomes from MIM into a modern Entra ID operating model. It supports desired state, Smart Collections, workflows, exception handling, evidence, and controlled coexistence.