Hybrid Identity Management with Entra ID: How to keep permissions consistent
Hybrid Identity Management is changing the way identities are managed. Organizations that combine Microsoft 365 and Entra ID with an on-premises Active Directory operate two identity systems that logically belong together but function differently from a technical perspective. One stores groups and users on domain controllers, the other in a cloud platform with its own policies, tokens, and access layers.
This creates a tension between control, speed, and security. When identities are maintained in parallel across both worlds, administrators quickly lose visibility. Some users exist twice, others retain outdated group permissions, and audits reveal that no one can clearly determine who has access to what. This situation is not just inefficient, it directly compromises security. Every inconsistent identity represents a potential attack vector.
A centralized identity governance model is therefore not a theoretical ideal, but a necessary foundation for stable and auditable permission structures. Modern identity and access models are no longer oriented around domains or departments, but around roles, lifecycle states, and automated processes.
Index
Typical Challenges
In practice, inconsistencies often go unnoticed.
- A user is disabled in the cloud but remains active in the on-premises Active Directory.
- A service account is granted temporary elevated permissions and keeps them for years.
- Groups originally created for projects still contain people who are no longer involved.
The root cause usually lies in separate administrative processes. While the cloud with Entra ID provides dynamic groups, role-based access control, and Conditional Access, the on-premises AD still operates with static groups and ACLs. Both systems have their own attributes, event logs, and APIs. Without a unified identity model, different realities inevitably emerge.
In addition, there is the challenge of traceability. Cloud logs, local Event Viewer entries, and HR systems each provide only partial information. When an audit needs to demonstrate seamlessly who received which permission and when, it often fails due to the lack of consolidated data.
Finally, organizational responsibility also plays a role. In many companies, it is unclear who is actually responsible for identity data, IT, HR, or a business unit. Without clearly defined ownership, fragmented truths develop. This is exactly where problems begin, and in hybrid environments they grow exponentially.
Best Practices for consistent permissions
Define an authoritative identity source
The first step toward consistent permissions is the definition of an authoritative identity source. It determines where an identity originates and which systems consume this data.
In Microsoft environments, Entra ID is the logical center. With Entra Connect, accounts, groups, and selected attributes are synchronized from the on-premises Active Directory. This creates a shared foundation on which cloud services such as Exchange Online, Teams, and SharePoint can build.
Permissions as part of a role model
Building on this foundation comes the role model. Permissions are no longer assigned individually, but as part of a role that describes a function or organizational position. A sales employee automatically receives access to CRM, Teams channels, and Exchange mailboxes associated with that role. If the person moves to another department, only the role changes, and all permissions adjust automatically.
For technical implementation, platforms that leverage Microsoft Graph and Entra ID Governance policies are suitable. This combination enables centralized control of changes while synchronizing with on-premises systems via interfaces.
Change Is an Event
Another principle is: “Change is an event.” Every modification to an identity, from a new phone number to a group change, must be traceable. Systems should automatically log who changed which values and when. Entra ID provides audit logs that can be queried via Graph. This creates a centralized audit trail that fully reflects hybrid scenarios.
Automate the Lifecycle
Finally, best practice includes lifecycle automation. Onboarding, role changes, and offboarding become automated processes. New user accounts are created through defined workflows, role changes trigger automatic group adjustments, and upon leaving the company all permissions are revoked. The more consistently these processes are automated, the more stable and secure the permission structure remains.
Solution Approach with the my-IAM platform
In hybrid architectures, simple synchronization between Entra ID and Active Directory is often not enough. Many organizations also use HR systems, CRM platforms, or line-of-business applications that contain their own identity data. This diversity inevitably leads to inconsistent data sets and redundancy.
This is where identity platforms such as the my-IAM platform by FirstAttribute come in, consolidating data from multiple sources, cleansing it, and providing it in real time.
The my-IAM platform aggregates identity information from Entra ID, Active Directory, and systems such as HR or CRM, harmonizes it through a central logic layer, and makes it available via standardized interfaces.
Changes in source systems are detected immediately and transferred to target systems. This ensures identities remain up to date across all systems without requiring manual administrative intervention. In a typical scenario, my-IAM synchronizes data from Entra ID and a CRM system, removes duplicates, standardizes naming formats, and provides it to applications such as a global organizational directory or a new cloud app.
This resolves one of the core problems of hybrid IT environments: fragmented identity data. Organizations retain their existing systems and processes, while the platform acts as a mediation layer between sources.
💡It does not centralize systems, it digitalizes the exchange. Changes flow automatically in both directions, keeping permissions consistent without requiring business departments to leave their working environment.
In combination with user-friendly apps such as my-IAM PeopleConnect, this creates visible value for end users.
While the my-IAM platform ensures the technical integrity of identity data, PeopleConnect makes this information available in Microsoft Teams or Outlook as complete, searchable identity data. Employees see up-to-date contacts, roles, and communication channels based on the same identity foundation. From a technical perspective, this creates a clear relationship between identity, role, and permission. The data is not duplicated, but referenced.
This architecture is scalable, auditable, and adaptable, exactly the qualities hybrid organizations require.
Example: Lifecycle Automation
Employee Onboarding
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An IT administrator creates a new user in the on-premises Active Directory and sets the following attributes:
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In AD:
userPrincipalName = max.mueller@company.com
department = Finance
title = Financial Analyst
employeeID = 4711 -
my-IAM detects directory changes in Active Directory and identifies the new object. Based on defined rules, it automatically:
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synchronizes the user object to Entra ID
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assigns the Entra ID group “Finance-Users”
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activates a Microsoft 365 E3 license via group-based licensing
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matches the object with existing identities in other systems (e.g., HR, CRM)
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All steps are rule-based and require no manual intervention.
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From that point on, business units can maintain additional attributes in their respective systems.
my-IAM ensures that changes are consistently transferred to all connected systems.
The updated identity data is immediately available in PeopleConnect within Microsoft Teams and Outlook as complete, searchable contact information.
Security and Traceability
Centralized identity governance not only improves efficiency but also enhances security. Organizations that manage permissions consistently minimize their attack surface.
➡️ A compromised account can be disabled immediately across all systems. A security policy defined in Entra ID also applies to all synchronized accounts in Active Directory.
In addition, a consolidated identity model increases transparency. Every role, every group membership, and every access rule is clearly documented. Changes can be traced by time and by person. This provides clear evidence for internal audits and external assessments.
Data protection also benefits. Contact and identity data are among the most sensitive assets of any organization. Central governance ensures they are transmitted only to authorized systems and used in compliance with internal policies and legal requirements.
Conclusion
Hybrid identity management is not a peripheral IT topic, but the prerequisite for any form of modern organizational structure. Without consistent permissions, security gaps, operational risks, and uncontrollable administrative overhead emerge.
The solution lies in an architecture that treats identities, roles, and permissions as a connected system. Entra ID and Microsoft Graph provide the technical foundation. Services of the my-IAM platform such as my-IAM RealIdentity and my-IAM PeopleConnect demonstrate how this infrastructure can be combined into a functioning whole. They enable organizations to consolidate identity data in real time, automatically adjust permissions, and maintain consistent access across on-premises and cloud systems.
Organizations that implement these principles achieve more than order in user directories. They create a secure foundation on which processes, communication, and automation can reliably build, robust, transparent, and future-ready.
More about the my-IAM platform
The my-IAM platform consolidates all identities from various source systems and makes them usable for applications and apps of any kind. In addition to the Teams-integrated app my-IAM PeopleConnect, it includes the business services my-IAM RealIdentity and my-IAM RealGroup.
You can also reach our team by phone at
+49 8196 998 4330.
