A new staff member needs access before their first morning. A mobile device is lost. A contractor finishes up unexpectedly. These are identity decisions, not just IT tasks. Understanding Microsoft Entra versus Active Directory helps businesses decide where user accounts, devices and access controls should sit – and how to keep daily work secure without making it harder.
For many Australian organisations, the answer is not to choose one platform and discard the other. It is to understand what each service does, where it fits, and whether a hybrid model is still justified.
Active Directory, usually referring to Active Directory Domain Services (AD DS), is Microsoft’s traditional on-premises identity system. It runs on domain controllers within your office, data centre or hosted server environment. It manages users, computers, groups, policies and access to local resources such as file servers, applications and printers.
Microsoft Entra ID is Microsoft’s cloud identity and access management platform. Until 2023, it was known as Azure Active Directory. It manages access to Microsoft 365, Azure, thousands of software-as-a-service applications and modern devices, wherever users are working.
The most useful distinction is simple: Active Directory is designed around an internal network and domain-joined computers. Microsoft Entra ID is designed around identities accessing cloud services from any location.
They can work together, but they are not interchangeable products with different names. An organisation can synchronise accounts between Active Directory and Entra ID, yet still rely on each platform for different jobs.
Active Directory remains valuable where a business has on-premises systems that depend on it. This includes older line-of-business software, file servers, server-hosted applications, network authentication and devices managed with Group Policy.
For example, a construction firm may have specialist estimating software hosted on a local server, shared project folders and office-based workstations. Active Directory can provide dependable authentication and centralised policy control for that environment. A healthcare practice may also retain on-premises systems with vendor requirements that make a full cloud move impractical in the short term.
Its strength is deep control inside a Windows domain. Group Policy can enforce detailed workstation settings, map network drives and apply legacy configuration requirements that cloud-native tools may handle differently.
The trade-off is operational overhead. Domain controllers need patching, monitoring, backup, recovery testing and protection from compromise. Remote access often introduces VPN dependencies. If identity remains centred on the office network while staff work across sites, at home and on mobiles, access can become slow, inconsistent and harder to secure.
Microsoft Entra ID is built for organisations using Microsoft 365, Azure and cloud applications as their primary working environment. It provides a single identity for Outlook, Teams, SharePoint, OneDrive, Azure resources and many third-party applications.
More importantly, it enables controls that are relevant to modern security risks. Conditional Access can evaluate sign-in context before allowing access. Multi-factor authentication can protect accounts even when a password is stolen. Identity Protection can help identify unusual sign-in activity, while Privileged Identity Management can limit standing administrative access.
For a mobile field team, that means a staff member can securely access documents and Teams from a managed laptop or mobile without first connecting to an office network. Access can be limited if the device is not compliant, the sign-in is risky or multi-factor authentication has not been completed.
Entra ID also supports modern device enrolment through Microsoft Intune. Rather than relying solely on traditional domain join and Group Policy, devices can be Entra joined and managed over the internet. Policies, applications, encryption requirements and updates can be applied whether the device is in the office, on a worksite or at home.
That does not make Entra ID automatically right for every device. Older applications, specialised hardware and server-based workflows may still require Active Directory. The decision should follow business requirements, not a blanket assumption that cloud always replaces every legacy dependency.
| Requirement | Active Directory | Microsoft Entra ID | |—|—|—| | Primary environment | On-premises Windows networks | Microsoft cloud and internet-based access | | Best for | Domain-joined PCs, file servers and legacy applications | Microsoft 365, Azure, SaaS and remote work | | Device management approach | Group Policy and on-premises tools | Intune and cloud-based management | | Authentication protocols | Kerberos, NTLM and LDAP | Modern authentication, OAuth and SAML | | Security focus | Internal network controls | Identity, device compliance and conditional access | | Infrastructure responsibility | You maintain domain controllers | Microsoft operates the core cloud platform |
The table shows why a direct replacement conversation can be misleading. A business with no local servers and a Microsoft 365-first operating model may be well suited to Entra ID and Intune. A business with critical on-premises applications may need hybrid identity while it plans and funds a staged transition.
A hybrid identity model synchronises selected Active Directory identities to Microsoft Entra ID. Staff use one account across local and cloud resources, while the business keeps the systems that still need domain authentication.
This approach is common, but it needs disciplined management. Synchronisation does not remove the need to secure Active Directory. In fact, an on-premises compromise can affect cloud identities if attackers gain enough privilege. Old administrator accounts, weak service account passwords and unsupported domain controllers create risk beyond the server room.
Hybrid identity should therefore be treated as an operating model, not a set-and-forget configuration. It needs clear ownership, monitoring, tested recovery procedures and regular review of synchronised accounts and privileged groups.
A good hybrid design also avoids carrying every old practice into the cloud. For example, use Entra Conditional Access and multi-factor authentication for cloud services rather than assuming a password plus VPN is sufficient. Use Intune for devices that no longer need traditional Group Policy. Retire old accounts and services as dependencies are removed.
The real question is not whether Entra ID has more features than Active Directory. It is whether your identity controls reflect how your people work and the systems they use.
Start with privileged access. Administrators should not use highly privileged accounts for routine email and web browsing. Access should be limited to what each role needs, elevated only when necessary and reviewed regularly. This supports the intent of the Essential Eight: reduce the opportunities for attackers to gain and retain control.
Next, consider authentication. Multi-factor authentication should cover all users, particularly administrators, finance staff and anyone with access to sensitive information. Where practical, phishing-resistant methods such as passkeys or security keys provide stronger protection than codes sent by SMS.
Device state matters too. A valid password should not be the only condition for opening business data. Entra ID and Intune can require encryption, supported operating systems, security software and a compliant device before granting access to services such as SharePoint and Exchange Online.
Finally, plan for account recovery. If a global administrator is locked out, who can restore access? If a domain controller fails, how quickly can authentication be recovered? Identity is a business continuity dependency. It belongs in recovery planning, not only in the IT configuration file.
A cloud-first approach is generally appropriate when your users work mainly in Microsoft 365 and browser-based applications, devices are mobile, and on-premises servers are no longer central to operations. In that model, Entra ID, Intune and Conditional Access can simplify administration while strengthening control.
A hybrid approach is appropriate when the business still depends on local servers, legacy applications or domain-based authentication. The goal should be to run hybrid identity deliberately, with a roadmap for the dependencies that remain, rather than leaving it in place simply because no one owns the decision.
An on-premises-first approach can still be necessary in limited cases, particularly where applications cannot operate without it. Even then, cloud identity controls for Microsoft 365 should be configured properly. Keeping Active Directory does not mean accepting weaker protection for email, collaboration or remote access.
At AZ Cloud Solutions, this assessment starts with the systems people actually use, the data they access and the downtime the business can tolerate. The result should be a practical identity design, clear accountability and reporting that explains the security position in plain English.
The right platform is the one that gives your people reliable access while making unauthorised access far harder. Review identity before the next new starter, lost device or suspicious sign-in turns a routine task into a business disruption.