Microsoft Entra ID: Getting the Transition from Active Directory Right

Your Active Directory was built for a world of offices and on-premises servers. That world has changed. With remote work, the cloud and SaaS applications, Microsoft Entra ID has become the new center of gravity for enterprise identity. Still confusing Active Directory with the former Azure Active Directory? That confusion costs you time and security. Here is how to get the transition right.

Table of Contents

• Microsoft Entra ID: what are we talking about?
• Entra ID vs Active Directory: the fundamental difference
• Why and when to consider the shift to the cloud
• The key features of Entra ID
• Hybrid architecture with Entra Connect
• The steps to a successful transition
• Train and certify with SC-300
• Conclusion
• FAQ

Microsoft Entra ID: what are we talking about?

Microsoft Entra ID is Microsoft’s cloud-based identity and access management service. It provides authentication, policy enforcement and protection for users, devices and applications. In plain terms, it decides who can connect to which resource, and under which conditions.

Many people know this product under its former name: Azure Active Directory, or Azure AD. Indeed, Microsoft renamed Azure AD to Microsoft Entra ID. The display names of the offerings changed on October 1, 2023. This change aimed to better communicate the multicloud and multiplatform nature of the product. It also aimed to reduce confusion with Windows Server Active Directory.

An important point: this renaming broke nothing. All login URLs, APIs, PowerShell cmdlets and Microsoft Authentication Libraries stay the same. In other words, if you used Azure AD yesterday, you use Entra ID today. Only the product name and icons changed. The features themselves remain in place.

Entra ID vs Active Directory: the fundamental difference

Here is the most common mistake: believing that Entra ID is simply Active Directory hosted in the cloud. That is false. These are two different technologies, designed for different uses. Understanding this distinction is the key to any modern identity strategy.

Active Directory Domain Services, or AD DS, is an on-premises directory. It manages domains, organizational units and group policies (GPOs). It relies on legacy protocols such as LDAP, NTLM and Kerberos. In short, it excels at managing domain-joined Windows devices within a corporate local network.

Entra ID works on a radically different model. It uses no organizational units and no GPOs. Instead, it relies on modern web protocols: OAuth 2.0, SAML and OpenID Connect. These protocols are designed for SaaS applications and access from anywhere. Consequently, Entra ID is the ideal control plane for a cloud and mobile world.

A table to clarify

The following table summarizes the structural differences between the two technologies. It will help you choose the right tool for the context.

Keep this in mind: Active Directory is not dead. It remains relevant for many on-premises scenarios. However, it was not designed for the cloud. Entra ID fills that gap. Most organizations therefore use both, together, in a hybrid architecture.

Why and when to consider the shift to the cloud

The point is not to remove Active Directory overnight. The point is to decide where to place the center of gravity of your identity. For most Swiss companies, that center is moving toward the cloud. Several concrete reasons explain this movement.

First, usage has changed. Your employees work from home, on the move or at a client site. The traditional network perimeter has vanished. Indeed, a simple firewall wall no longer protects resources hosted in Microsoft 365 or in other SaaS services. Identity becomes the new security perimeter.

Next, the nature of applications has evolved. Your teams use dozens of cloud applications every day. However, Active Directory does not natively support SaaS applications. You then need a federation system such as AD FS, which is heavy to maintain. Entra ID integrates these applications directly, through standard protocols.

Finally, security demands new reflexes. The Zero Trust approach starts from a simple principle: never trust by default, always verify. This approach requires fine-grained, contextual identity management. That is exactly what Entra ID offers, with multi-factor authentication and Conditional Access. Therefore, the shift to the cloud is not just a matter of comfort: it is a matter of security posture.

The key features of Entra ID

Entra ID is not just a cloud directory. It is a complete identity and access management platform. Here are the most important building blocks to know. They form the foundation of a modern security strategy.

• Single sign-on (SSO): your users sign in once and access all their applications. Fewer passwords, less friction, less risk.
• Multi-factor authentication (MFA): a second proof of identity (phone, app, key) protects accounts even if a password is compromised.
• Conditional Access: rules decide who accesses what, based on context. User, device, location, risk level: all are taken into account.
• Role-based access control (RBAC): each user receives exactly the rights their role needs, no more, no less.
• Identity Protection: the platform detects risky sign-ins and compromised identities, then triggers automatic measures.
• External identity management (B2B and B2C): you collaborate with partners and customers without creating local accounts to manage manually.

Conditional Access deserves special attention. It is the heart of identity-driven security. In practice, it applies policies at the moment of sign-in. For instance, it can require MFA for access from an unusual country. It can also block a non-compliant device. As a result, the access decision becomes dynamic and contextual, instead of being fixed.

Hybrid architecture with Entra Connect

Most companies do not start from a blank page. They already have an on-premises Active Directory, with years of history. Good news: you do not have to choose between the two. The hybrid architecture lets AD DS and Entra ID coexist. The bridge between the two worlds is called Microsoft Entra Connect.

Entra Connect is the tool that synchronizes your on-premises directory with Entra ID. It ensures that identities and groups stay consistent on both sides. As a result, an employee uses the same identifier, whether accessing a local file share or a Microsoft 365 application. This is the key to a seamless experience for your users.

This hybrid approach offers several advantages. It protects your existing investments in Active Directory. Moreover, it lets you migrate at your own pace, application by application. Here are the main synchronization scenarios to know:

• Password hash synchronization: simple to deploy, it replicates a fingerprint of the password to the cloud.
• Pass-through authentication: password validation stays on your local server, without storing a fingerprint in the cloud.
• Federation: authentication is delegated to a federation service such as AD FS, for specific needs.

Furthermore, for legacy applications that use Kerberos or LDAP, a gateway exists. The Microsoft Entra application proxy publishes these on-premises applications securely. Your users access them from the outside, with Entra ID authentication. You therefore coexist during the migration, without breaking what already works.

The steps to a successful transition

An identity migration cannot be improvised. It is prepared, planned and managed. A poorly run transition can lock out users or open security gaps. Conversely, a structured approach secures your access while preserving continuity. Here are the main steps to follow.

Step 1: map the existing environment

Start with the inventory. List your users, groups, applications and current access. Identify what lives on-premises and what is already in the cloud. This initial snapshot is essential. Indeed, you only migrate well what you understand precisely.

Step 2: deploy Entra Connect and synchronize

Next, install Microsoft Entra Connect. Choose the authentication method suited to your context. Then launch the synchronization of your identities to the cloud. Check that each account is correctly reflected on both sides. This phase establishes the hybrid foundation on which everything else rests.

Step 3: secure with MFA and Conditional Access

Once the identities are in the cloud, enable multi-factor authentication. Then deploy progressive Conditional Access policies. Start with privileged accounts, then extend to the rest of the organization. However, move forward in stages. A deployment that is too abrupt generates lockouts and frustration.

Step 4: govern identities over time

Security is not a one-off project. It is a continuous process. Put identity governance in place: regular access reviews, Privileged Identity Management (PIM) and automated lifecycles. In this way, rights stay aligned with real needs. Consequently, the attack surface shrinks over time.

To go deeper into each step, Microsoft’s official documentation is the reference. There you will find the Entra ID overview, the comparison between Active Directory and Entra ID, as well as the Conditional Access overview. These resources detail each setting to configure.

Train and certify with SC-300

Mastering Entra ID cannot be improvised. The concepts are numerous: hybrid synchronization, Conditional Access, PIM, external identities. Structured training saves valuable time. It also avoids costly configuration mistakes. This is where the Microsoft SC-300 certification comes in.

The Microsoft Certified: Identity and Access Administrator Associate certification validates the identity administrator’s skills. It attests that you can design, implement and manage an identity system based on Entra ID. It is a recognized reference on the Swiss and international market.

The Microsoft Identity and Access Administrator (SC-300) training prepares you directly for this exam. In four days, you learn to configure Entra ID, multi-factor authentication, Conditional Access and identity protection. You also work on privileged identity management and hybrid identity. The training combines theory and hands-on labs on the official Microsoft cloud environment.

This type of skill answers a concrete business need. Indeed, identity management is the first pillar of a Zero Trust strategy. A trained team deploys faster, secures better and documents cleanly. In short, investing in certification turns a technical constraint into a lasting operational advantage.

Conclusion

Microsoft Entra ID redefines enterprise identity management. It is not Active Directory in the cloud, but a platform designed for a mobile, connected world. The distinction is essential. AD DS remains useful on-premises, while Entra ID becomes the control plane for cloud access. The two complement each other in a hybrid architecture.

For Swiss companies, the transition is no longer a distant option. Remote work, SaaS applications and the Zero Trust approach push identity to the center of security. The good news: you can move at your own pace. Entra Connect ensures coexistence, and a gradual migration preserves the continuity of your operations.

The key to success remains internal skill. Understanding SSO, MFA, Conditional Access and governance changes everything. A team trained in SC-300 deploys faster and secures better. In this way, you turn a technical challenge into a genuine lever of trust for your customers and partners.

FAQ

Are Azure Active Directory and Microsoft Entra ID the same thing?
Yes. Microsoft renamed Azure Active Directory to Microsoft Entra ID, with a change of display names on October 1, 2023. The product, its features, its APIs and its login URLs stay the same. Only the name and the icons changed.

Do you have to remove Active Directory to move to Entra ID?
No. Active Directory remains relevant for many on-premises scenarios. Most organizations keep AD DS and synchronize it with Entra ID through a hybrid architecture. You then migrate gradually, application by application, without disruption.

What is the difference between Active Directory and Entra ID?
Active Directory is an on-premises directory based on LDAP and Kerberos, designed for Windows devices on a local network. Entra ID is a cloud identity service based on OAuth 2.0, SAML and OpenID Connect, designed for SaaS applications and remote access.

What is Conditional Access in Entra ID?
Conditional Access applies security rules at the moment of sign-in. It takes into account the user, the device, the location and the risk level. It can then require multi-factor authentication, block access or allow it depending on the context.

What is the SC-300 certification for?
The SC-300 certification validates the skills of a Microsoft identity and access administrator. It attests that you can design and manage an identity system based on Entra ID: authentication, Conditional Access, governance and hybrid identities. The four-day ITTA training prepares you directly for it.