Choosing between Microsoft Entra Connect Sync and Microsoft Entra Cloud Sync starts with your directory requirements, not a preference for cloud management. For teams comparing Entra Connect Sync vs. Cloud Sync, the deciding factors are feature coverage, topology, operational effort, and migration risk.
Both connect on-premises Active Directory (AD) with Microsoft Entra ID, but they use different architectures. This comparison identifies category winners and explains when existing dependencies outweigh simpler administration.
Quick Verdict: Entra Connect Sync vs. Cloud Sync
Bottom line: Cloud Sync is the strategic choice for most new, supported deployments; continue using Connect Sync when essential capabilities require it.
Advanced customization: Connect Sync wins for complex rules and metaverse processing.
Simplified operations: Cloud Sync wins with lightweight provisioning agents and cloud-managed configuration.
Migration: Use Microsoft’s readiness assessment and guided approach rather than assuming parity.
Implementation support: Windows Management Experts, Inc. (WME) is our top pick here for complex assessment and execution, not a replacement for either synchronization product.
Head-to-Head Comparison
Microsoft’s Cloud Sync documentation explains the cloud-managed model and evolving capabilities; check current support before selecting either tool.
| Feature/Category | Microsoft Entra Connect Sync | Microsoft Entra Cloud Sync |
| Architecture | On-premises sync engine and SQL database | Cloud service and local agents |
| Management | Local server configuration | Microsoft Entra admin center |
| High availability | Staging server; planned failover | Multiple active agents |
| Maintenance | Server, database, upgrades | Automatic agent updates |
| Advanced rules | Metaverse and synchronization rules | Declarative mappings and expressions |
| Topology | Complex joins and attribute merging | Multiple, including disconnected, forests |
| Device synchronization | Established hybrid-device synchronization | Validate current device support |
| Writeback | Feature-specific configuration | Validate password and group writeback requirements |
| Monitoring | Synchronization Service Manager | Provisioning logs and status |
| Migration | Retain for blocking dependencies | Assess eligibility; migrate supported scope |
| Licensing | Verify required feature licenses | Verify required feature licenses |
| Best fit | Customized hybrid environments | Supported cloud-managed deployments |
On a phone, scroll the table sideways to see every column.
Architecture and Reliability: Entra Connect Sync vs. Cloud Sync
The Microsoft Entra Connect Sync service runs a stateful engine with a local SQL database. Administrators manage synchronization state through Synchronization Service Manager and must plan patching, backup, and failover.
Cloud Sync uses the Microsoft Entra provisioning service, with configuration in the Microsoft Entra admin center. Multiple Microsoft Entra provisioning agent installations reduce reliance on a single point of failure, although AD connectivity and agent health still matter.
Category winner: Microsoft Entra Cloud Sync, because high availability through multi-agent support reduces routine infrastructure administration.
Features and Customization: Entra Connect Sync vs. Cloud Sync
Both address synchronization of users, groups, contacts, and password hash synchronization. Validate custom AD attributes and directory extensions against each configuration’s supported mappings.
Connect Sync offers advanced rules, metaverse controls, cross-forest references, and attribute-merging logic. Cloud Sync’s disconnected-forest support does not mean it reproduces every complex join or transformation.
Check Exchange hybrid scenarios, device writeback, password writeback, and group writeback individually. Support depends on the feature, direction, and configuration, not simply whether “writeback” appears in a feature list.
Category winner: Microsoft Entra Connect Sync, for highly customized identity flows and established feature coverage.
Deployment and Administration: Entra Connect Sync vs. Cloud Sync
Connect Sync requires local installation, service-account planning, database maintenance, and sync cycle management. Synchronization Service Manager provides detailed connector, import, synchronization, and export diagnostics.
Cloud Sync moves configuration into the cloud while retaining local agent and connectivity requirements. Provisioning logs and synchronization status support troubleshooting, but administrators still need to investigate mapping errors, permissions, and failed objects.
For either service, separate password writeback permissions from basic synchronization setup and assign monitoring ownership before deployment.
Category winner: Microsoft Entra Cloud Sync, for simpler daily administration in supported configurations.
Scalability and Topology: Entra Connect Sync vs. Cloud Sync
Cloud Sync supports eligible multi-forest designs, including disconnected forests. Multiple active agents provide deployment flexibility in datacenters and Infrastructure-as-a-Service (IaaS) environments without designating one permanently active synchronization server.
Connect Sync remains valuable when identities require complex joins or attribute consolidation. Neither architecture removes the need to resolve duplicate userPrincipalName and proxyAddresses values, establish authoritative sources, and test cross-forest matching.
Duplicate attribute resiliency can mitigate certain conflicts; it does not replace directory cleanup.
Category winner: Microsoft Entra Cloud Sync, for supported distributed deployments with simpler matching requirements.
Migration Readiness and Risk: Entra Connect Sync vs. Cloud Sync
Treat migration as feature validation, not an automatic upgrade. Inventory synchronization configuration, rules, device state, writeback, service dependencies, exception handling, and reconciliation behavior.
Use Microsoft’s migration decision guide and guided migration where applicable. Document coexistence boundaries and rollback before changing production ownership; WME can support assessment, security hardening, and controlled execution.
Category winner: Microsoft Entra Cloud Sync for eligible migrations; Connect Sync remains the safer choice when blockers cannot be removed.
Decide after a documented readiness assessment, not architecture preference.
We can inventory your sync rules, writeback and Exchange dependencies, and tell you whether your environment can move to Cloud Sync or should stay on Connect Sync.
Migration Checklist for Complex Environments
Record forests, scope, custom attributes, matching rules, cross-forest references, and Source of Authority (SOA) management.
Validate Microsoft Entra hybrid joined devices, Cloud Kerberos Trust, Seamless Single Sign-On, and Exchange dependencies.
Define pilot users, monitoring ownership, reconciliation checks, rollback criteria, and communications.
Check US Government Cloud availability and any Microsoft Entra ID Governance dependencies separately.
Implementation and Migration Support: Windows Management Experts, Inc.
WME is a professional services and staffing firm supporting complex technology environments. Its relevant strengths include identity and access management, Microsoft 365 and Azure consulting, cloud migration, security evaluation, infrastructure modernization, and hands-on delivery.
Contact WME for a project assessment and scope-based pricing. It is our top implementation-support pick for fragmented, regulated, or business-critical environments where synchronization dependencies, directory extensions, and Microsoft Online Services access need coordinated planning; its role is to reduce execution risk, not guarantee a disruption-free migration.
About Microsoft Entra Connect Sync
The Microsoft Entra Connect Sync component of the Microsoft Entra Connect application synchronizes on-premises identities with Microsoft Entra ID. Its standout capabilities include advanced synchronization rules, metaverse-based processing, password hash synchronization, and the ability to merge attributes from multiple domains in supported designs.
Licensing and feature availability depend on your Microsoft Entra and Microsoft 365 subscriptions; verify current requirements with Microsoft. As described in Microsoft’s Connect documentation, it fits organizations needing established hybrid capabilities and customization, making it the practical choice when those requirements outweigh infrastructure overhead.
About Microsoft Entra Cloud Sync
Microsoft Entra Cloud Sync uses on-premises provisioning agents and cloud-managed configuration to synchronize supported directory objects. Automatic agent updates, provisioning logs, multi-agent resilience, and reduced on-premises infrastructure are its main operational advantages.
Verify licensing and feature availability with Microsoft, including cloud-to-Active Directory provisioning, often called cloud-to-AD user provisioning. Treat Active Directory computer objects and Exchange hybrid scenarios as explicit compatibility checks; Cloud Sync is the preferred option for supported deployments, not a blanket replacement for every Connect Sync workload.
When to Choose Entra Connect Sync vs. Cloud Sync
Choose Microsoft Entra Connect Sync if:
Advanced rules or metaverse controls are essential.
Complex cross-forest references require its processing model.
Required Exchange or writeback functionality blocks migration.
Choose Microsoft Entra Cloud Sync if:
Your topology and features meet current requirements.
Multi-agent resilience and simpler management are priorities.
Its reconciliation capabilities and Microsoft’s strategic direction for hybrid identity synchronization fit your operating model.
Choose WME for readiness assessment, security review, migration design, or implementation support when your team needs additional expertise.
Final Recommendation
Make Microsoft Entra Cloud Sync the default direction for new, supported deployments because it reduces local administration and supports resilient agent deployment. Retain Connect Sync when advanced rules, forest relationships, or hybrid workloads still depend on it.
Decide after a documented readiness assessment, not architecture preference alone. The System for Cross-domain Identity Management (SCIM) standard addresses provisioning interoperability, but does not establish feature parity between these tools; WME can help assess the actual dependencies and plan a controlled transition.
FAQs
These answers address common naming, coexistence, and support questions.
Is Microsoft Entra Connect Sync Deprecated?
No, Microsoft Entra Connect Sync remains supported, although individual versions have their own support lifecycles. Cloud Sync is Microsoft’s strategic cloud-managed direction for supported deployments.
Can You Use Entra Connect Sync and Cloud Sync at the Same Time?
Yes, supported coexistence and migration scenarios are possible. Plan object ownership, attribute flows, and synchronization scope carefully, and follow Microsoft’s migration guidance to avoid conflicting updates.
Is Microsoft Entra Sync the Same as Microsoft Azure AD Sync?
“Microsoft Entra Sync” is an imprecise label. Microsoft Entra Connect Sync is the current name associated with Azure AD Connect synchronization; the older Azure AD Sync product is a predecessor, not simply an interchangeable current name.
What Is Microsoft Entra Connect Sync Used for?
It synchronizes identities and selected attributes between on-premises Active Directory and Microsoft Entra ID. It supports hybrid identity through capabilities such as password hash synchronization and customized identity flows.
Which Is Better for Multiple Active Directory Forests?
Cloud Sync is often the simpler choice for supported multi-forest and disconnected-forest designs. Choose Connect Sync when complex joins, cross-forest references, or attribute-merging requirements demand its more advanced processing model.
Decide after a documented readiness assessment, not architecture preference alone.
WME can help assess the actual dependencies and plan a controlled transition, whichever synchronization tool you land on.
