Updated: 19 Jun 2026
Cisco Duo is a purpose-built MFA and zero trust access platform. Microsoft Entra ID is a full identity platform that includes MFA as one of its capabilities. The two products solve overlapping but distinct problems. The right choice depends on what the rest of the environment looks like.
In India, Cisco Duo is deployed through authorised partners, including Proactive Data Systems, a Cisco Preferred Security Partner, which assesses which platform fits a specific environment before any deployment begins.
Microsoft Entra ID, formerly called Azure Active Directory, handles directory services, user authentication, conditional access policies, privileged identity management, identity governance, and external identity management. Microsoft Authenticator is the MFA component within the Entra ID platform. When evaluating Azure AD vs Cisco Duo, the comparison is typically between Duo and the MFA and conditional access capabilities of Entra ID specifically.
Cisco Duo does not manage directory services. It relies on an existing directory, Active Directory, Entra ID, or LDAP, for user identity. It then adds MFA, device trust, adaptive authentication, and zero trust network access on top of that directory.
The two products can be used together. Many organisations run Entra ID as the identity directory and Cisco Duo as the MFA layer across systems that Entra ID cannot reach natively.
This is the most practically significant difference for Indian enterprises.
Microsoft Entra ID is optimised for the Microsoft ecosystem. Conditional Access policies work natively with Microsoft 365, Azure resources, and applications integrated via SAML or OAuth. For RADIUS-based integration with legacy VPN concentrators, Entra ID requires the Network Policy Server extension. This works but supports fewer authentication factors than native Entra ID policies and produces less granular log detail than Duo's Authentication Proxy.
Cisco Duo integrates with any infrastructure via RADIUS through its Authentication Proxy. It covers legacy VPNs regardless of manufacturer, on-premises ERP systems, Linux infrastructure, OT environments including SCADA and MES platforms, and any LDAP-authenticated application. It does not require any application to support modern authentication protocols.
The majority of Indian enterprise environments outside cloud-native setups run mixed-vendor infrastructure. Legacy VPN concentrators, on-premises applications, and in manufacturing, OT systems that predate modern authentication entirely. For these environments, Cisco Duo's infrastructure-agnostic architecture has a practical advantage that Entra ID cannot replicate without significant additional configuration.
Both platforms offer device trust capabilities.
Microsoft Entra ID device trust integrates with Microsoft Intune. For managed devices enrolled in Intune, Conditional Access enforces device compliance as a condition of access. This works well for organisations with a fully managed corporate device fleet.
Cisco Duo's device health application checks device posture without requiring MDM enrollment. It reads OS version, encryption status, screen lock, and management status from any device. This covers contractor devices, vendor-owned equipment, and BYOD scenarios where Intune enrollment is not possible or practical. For Indian enterprises with high contractor volumes or mixed device environments, this distinction matters.
Cisco Duo operates a dedicated data centre in Mumbai, operational since May 2022. Authentication data for Indian tenants is processed and stored in India. This satisfies CERT-In CISG-2025-02's requirement for 180-day log retention stored in India and is documented clearly for audit purposes.
Microsoft Entra ID authentication data for Indian tenants is processed through Microsoft's data centre infrastructure. Microsoft operates data centres in Pune and Chennai for Azure services. The specific data residency for Entra ID authentication logs requires direct verification with Microsoft, as data classification and residency for identity services is distinct from Azure compute residency.
For Indian enterprises with CERT-In log residency requirements, Cisco Duo's Mumbai data centre provides a clear, documented answer. Entra ID requires a separate verification step with Microsoft to confirm equivalent compliance.
Cisco Duo protects SCADA systems, PLCs, and MES platforms via RADIUS-based LDAP proxy integration. These systems authenticate against Active Directory through the Duo Authentication Proxy without requiring changes to the OT software or the validated application.
Microsoft Entra ID does not have a RADIUS Authentication Proxy. OT systems authenticating via LDAP against on-premises Active Directory cannot be covered by Entra ID Conditional Access without significant infrastructure changes.
For Indian manufacturing organisations deploying MFA across converged OT and IT environments, this is a decisive difference. CERT-In CISG-2025-02 requires MFA for all remote access without exception for OT environments. Cisco Duo satisfies this requirement. Entra ID cannot reach these systems natively.
Microsoft Entra ID P1, which includes Conditional Access, is included in Microsoft 365 Business Premium and Microsoft 365 E3. Entra ID P2, which adds Privileged Identity Management and Identity Protection, is included in Microsoft 365 E5 or available as an add-on.
Cisco Duo is a separate per-user, per-month subscription regardless of Microsoft licensing. It is not included in any Microsoft 365 bundle.
For organisations already paying for Microsoft 365 Business Premium or E3, Entra ID MFA for Microsoft-connected applications has an effective additional cost of zero. For covering non-Microsoft systems, Cisco Duo is an additional investment.
Three questions determine the right choice.
How much of the environment is Microsoft? If the authentication surface is primarily Microsoft 365, Azure, and Entra ID-integrated SaaS applications, Entra ID Conditional Access with Microsoft Authenticator is a logical and cost-effective choice. It is included in existing licences and deeply integrated with the Microsoft stack.
Does the environment include legacy VPNs, on-premises applications, or OT systems? If yes, Cisco Duo's RADIUS-based Authentication Proxy is required. Entra ID cannot cover these systems without significant additional configuration.
Is India data residency a documented CERT-In compliance requirement? Cisco Duo's Mumbai data centre provides a clear, auditable answer. Entra ID requires direct verification with Microsoft for equivalent documentation.
Many Indian enterprises use both. Entra ID manages the Microsoft-connected identity layer. Cisco Duo covers non-Microsoft systems, legacy VPNs, and OT environments. This is a valid and common architecture. The two platforms are not mutually exclusive.
Quick answers to common questions about this topic.
We'll get back to you shortly.
