# Active Directory and Entra ID: Identity Management Evolution
Active Directory defined enterprise identity for over two decades. Domain controllers authenticated users. Group Policy configured workstations. Organisational units structured administration. On-premises identity just worked.
Cloud computing challenged this model. SaaS applications multiplied. Mobile devices proliferated. Remote work became normal. Extending AD to cloud scenarios stretched the original design.
Azure Active Directory, now Microsoft Entra ID, reimagines identity for cloud reality. Cloud-native design addresses modern requirements. Integration with AD bridges on-premises investment.
## Active Directory Strengths
AD remains relevant for on-premises scenarios.
**Windows integration** runs deep. Domain join, Group Policy, Kerberos authentication—Windows expects AD. Alternatives exist but require effort.
**Established infrastructure** works reliably. Organisations invested heavily. AD delivers. Replacement has cost and risk.
**Hybrid identity** connects AD to cloud. Azure AD Connect synchronises identities. Users have single identity across environments. Federation enables SSO.
## Entra ID Advantages
Cloud-native design provides distinct benefits.
**SaaS integration** is native. Thousands of pre-integrated applications. SAML and OIDC protocols standard. SSO configuration simple.
**Conditional Access** implements Zero Trust. Location, device, risk level—all factor into access decisions. Policies encode security requirements.
**Modern authentication** moves beyond passwords. Passwordless authentication options. FIDO2 security keys. Microsoft Authenticator.
**Cloud scalability** without infrastructure management. Microsoft operates global infrastructure. High availability built in.
## Migration Considerations
Many organisations evolve toward Entra ID.
**Hybrid coexistence** enables gradual transition. AD and Entra ID work together. Cloud applications use Entra ID. On-premises applications use AD.
**Cloud-only scenarios** eliminate AD dependencies. New organisations may skip AD entirely. Modern applications assume cloud identity.
**Legacy application constraints** slow migration. Applications expecting Kerberos or LDAP need AD or alternatives. Assessment identifies blockers.
If your organisation needs help with identity modernisation or hybrid identity architecture, contact us through our contact page.
## Hybrid Identity: The Practical Reality
Most organisations run hybrid for years. Key points:
- define where the authoritative identity lives,
- avoid duplicated admin models,
- and standardise MFA and conditional access.
## Tiered Administration
Reduce blast radius by separating:
- workstation admin,
- server admin,
- and identity admin.
This is one of the most effective controls against ransomware and lateral movement.
## Hybrid Identity: The Practical Reality
Most organisations run hybrid for years. Key points:
- define where the authoritative identity lives,
- avoid duplicated admin models,
- and standardise MFA and conditional access.
## Tiered Administration
Reduce blast radius by separating:
- workstation admin,
- server admin,
- and identity admin.
This is one of the most effective controls against ransomware and lateral movement.