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Cisco replaced the former 300-820 CLCEI exam with 300-820 CLHCT on February 3, 2026 while keeping the same numeric code. The retired CLCEI concentration emphasized Expressway, business-to-business calls, Mobile and Remote Access, authentication, and Webex hybrid integrations. The active CLHCT v2.0 exam broadens the focus to collaboration cloud technologies, Webex Suite and device configuration, cloud management, security, migration, and APIs and programmability.
For current candidates, 300-820 is an active concentration within CCNP Collaboration and pairs with the 350-801 CLCOR core. It sits beside 300-815 CLACC on-premises call control and 300-830 CLCCE cloud customer experience. The broader Cisco certifications catalog now positions CLHCT as the concentration for engineers operating across hybrid and cloud collaboration services.
The version change matters because a study plan centered only on legacy Expressway tasks is incomplete. Expressway concepts can still be useful in hybrid environments, but the current blueprint expects broader cloud operations, migration, security, device management, and API knowledge.
Many organizations cannot move every calling, meeting, messaging, device, and compliance function to the cloud at once. Hybrid architecture lets on-premises services and Webex cloud capabilities operate together while migration proceeds at different speeds across sites and user groups.
The design needs clear ownership of identity, call control, directory synchronization, devices, PSTN connectivity, management, and compliance. Without that map, a failure can bounce between cloud and on-premises teams because each side sees only part of the transaction.
The broader idea of hybrid cloud computing is useful here: integration succeeds when workloads and control points are deliberately divided, not when two environments are simply connected and assumed to behave as one.
A hybrid design should also have an exit strategy for temporary coexistence components. Connectors, legacy routing, duplicate directory flows, and transitional policies are often introduced to make migration possible, but they can become permanent complexity if nobody defines when they are removed. Recording the purpose, owner, dependencies, and retirement condition for each bridge keeps the environment understandable as more users and services move to the cloud.
Current Webex administration relies heavily on Control Hub for organization settings, users, devices, services, security, and analytics. Candidates should understand how administrative roles are scoped and how changes propagate across the organization.
Centralization improves consistency but increases the blast radius of mistakes. A policy or license change can affect many users quickly, so staged rollout, pilot groups, role-based access, and change documentation remain important. Administrators should know which actions are reversible and which require support or additional migration work.
Operational monitoring should include service status, device health, calling analytics, and user experience. The goal is not merely to configure a tenant but to detect when cloud services, local connectivity, identity, or endpoint behavior degrade.
Centralized administration changes the blast radius of configuration mistakes. A policy, identity setting, device template, calling change, or security control can affect many users quickly, so role-based access, staged changes, audit history, and representative pilot groups become essential. Engineers should know which settings are organization-wide, which are location- or group-scoped, and which depend on external identity or network services. That context makes Control Hub an operational control plane rather than merely a web interface.
Cloud calling still depends on numbering, dial plans, routing, PSTN connectivity, calling permissions, emergency services, and site design. The difference is where those controls are managed and how cloud services interact with local gateways or providers.
Administrators should understand locations, trunks, route groups, dial plans, number assignment, and fallback behavior. A user who cannot place a PSTN call may have a cloud configuration issue, a local gateway problem, a provider issue, or a number-normalization mismatch.
Migration from on-premises Unified Communications Manager adds another layer because users, numbers, devices, and calling behavior need to move without breaking business workflows. Successful projects inventory dependencies before changing the call-control platform.
Cloud calling does not remove PSTN engineering. Number ownership, emergency calling, local gateway design, trunks, codecs, dial plans, survivability, and regulatory requirements still shape the service. What changes is the control model and the location of components. Candidates should be able to trace a call from user or device through Webex services to PSTN connectivity, identify where policy and number translation occur, and determine which logs or diagnostics belong to Cisco cloud services versus customer-managed infrastructure.
Meeting failures can involve identity, client versions, network paths, media reachability, device configuration, permissions, or service incidents. Messaging problems may involve user provisioning, organization policy, retention, encryption, or client connectivity. Treating every cloud symptom as an internet problem wastes time.
Troubleshooting should establish scope first: one user, one site, one service, or the whole organization. Then compare client evidence, Control Hub analytics, network tests, and Cisco service status. A narrow problem suggests account or endpoint configuration; a wide simultaneous problem suggests shared infrastructure or cloud-service dependencies.
Media quality needs objective evidence such as latency, loss, jitter, and path behavior. User descriptions are important, but analytics can show whether impairment is local Wi-Fi, ISP transit, corporate egress, endpoint resource pressure, or a broader service condition.
Service health should be assessed from the user workflow, not only from a provider status page. A tenant can be generally available while one identity integration, region, network path, device family, or feature is degraded. Engineers should collect a representative failing example, compare it with a working user or site, and line up timestamps across client diagnostics, cloud administration, identity, and network telemetry. That evidence narrows scope before a broad configuration change affects healthy users.
Collaboration devices may register directly to the cloud, operate through hybrid models, or participate in meetings and calling services with different management paths. Administrators should understand activation, configuration, software management, workspace assignment, and health monitoring.
Standardization reduces support burden. Consistent naming, templates, software policies, and workspace design make fleets easier to operate. Exceptions should be documented because unusual room configurations can become difficult to troubleshoot months later.
Cloud-managed devices also depend on identity and network reachability. Certificate problems, blocked outbound connections, DNS errors, or proxy configuration can prevent registration even when the device itself is healthy.
Device lifecycle management should include onboarding, identity, software policy, configuration ownership, monitoring, replacement, and secure decommissioning. A room device that is online is not necessarily healthy if its calendar integration, calling registration, sensors, peripherals, or policy assignments are wrong. Central management is most valuable when it exposes drift and allows teams to compare expected state with actual state across a fleet instead of treating each device as an isolated appliance.
Moving collaboration services to the cloud is not a single cutover for many enterprises. User groups, sites, call control, devices, voicemail, contact-center functions, and compliance requirements may migrate separately. A good plan identifies dependencies and defines what coexistence looks like during each phase.
Data and configuration readiness matter. User identities, phone numbers, emergency locations, device models, network capacity, and licensing should be validated before migration. Discovering unsupported devices or inconsistent directory data during cutover turns a technical project into a user-impact incident.
Rollback should be realistic rather than theoretical. Teams need to know which changes can be reversed, how long coexistence can be maintained, and how to communicate temporary feature differences to users.
Cloud Connected UC can provide a bridge between on-premises systems and cloud management or analytics during a transition. That model can help organizations gain centralized visibility before every workload is moved. Engineers should understand which data and controls remain on premises and which capabilities depend on cloud connectivity.
Identity migration also needs sequencing. Directory synchronization, user claiming, domain verification, licensing, and service assignment can affect whether users receive the expected cloud experience. Duplicate or inconsistent identities should be resolved before a large migration because collaboration history, calling assignment, and device ownership can become harder to reconcile afterward.
A hybrid migration should be described as a sequence of dependency changes rather than a single cutover date. Identity, directory synchronization, PSTN connectivity, numbering, devices, voicemail, meetings, messaging, compliance, and support processes may move at different times. A strong migration plan defines coexistence behavior, the users included in each wave, success criteria, and a rollback path. That same discipline applies to hybrid cloud more broadly: the difficult part is often coordinating boundaries between old and new systems.
The current blueprint expects candidates to understand security for administration, endpoints, meetings, and compliance, along with cloud security services such as identity, key management, indexing, compliance, and content handling. That makes security an architectural concern rather than a single tenant checkbox.
Administrative accounts should use strong authentication and least privilege. Devices should be managed and kept current. Meeting policies should reflect business requirements for guests, recording, sharing, and external collaboration. Compliance controls should align with retention and legal obligations.
Hybrid data security introduces additional key-management and infrastructure considerations. Organizations choosing more control over encryption components also accept responsibility for availability, lifecycle management, and operational support of those components.
Cloud collaboration also shifts evidence into multiple administrative domains. A user problem may require identity-provider logs, endpoint state, Control Hub events, calling diagnostics, network telemetry, and application-specific audit records. Troubleshooting is faster when teams agree on a shared timeline and identifiers before an incident occurs. The goal is to follow one user, device, call, or meeting across systems instead of treating each console as a separate investigation.
The CLHCT blueprint includes Webex APIs for messaging, meetings, calling, people, and events, along with developer and device extensibility concepts. Engineers do not need to become full-time software developers to benefit from APIs; even small automations can improve consistency in user, device, or reporting workflows.
API work should use proper authentication, secrets management, error handling, pagination, and rate-limit awareness. Scripts that perform administrative changes should validate current state, log what changed, and support safe rollback or repeat execution.
Events and webhooks can reduce polling by notifying applications when something happens. That pattern is useful for workflow integration, but receivers must validate requests and handle retries or duplicate events without creating repeated actions.
Network readiness remains fundamental even when the application is cloud-managed. Sites need sufficient internet capacity, stable DNS, compatible firewalls and proxies, and QoS decisions that reflect voice and video traffic. Cloud migration can expose weaknesses that were hidden when media stayed on a private WAN, so pre-migration testing should include real-time traffic rather than only basic reachability.
Organizations should also define support boundaries for hybrid deployments. When a user cannot call, message, join a meeting, or register a device, the incident may span local network, identity, on-premises call control, Webex cloud, or a carrier. A shared runbook with ownership and escalation evidence reduces the tendency for teams to hand the problem back and forth.
Lifecycle planning continues after migration. Cloud features change faster than traditional on-premises release cycles, and administrators need a process for reviewing new capabilities, policy defaults, device software, and deprecations. Controlled adoption keeps the environment current without exposing every user to untested change at once.
Programmability should focus on safe operational use cases: inventory collection, policy validation, device onboarding, reporting, workflow integration, and repeatable configuration. API authentication, pagination, rate limits, asynchronous operations, and error handling matter because a production workflow may touch hundreds or thousands of objects. Engineers should design automation so a partial failure is visible and recoverable instead of silently leaving the organization in mixed state.
Legacy CLCEI resources are still helpful for Expressway, remote access, and hybrid concepts, but they should not be treated as complete preparation for the active 2026 exam. Candidates need hands-on exposure to Control Hub, cloud calling, device administration, migration, security, and APIs.
A practical lab can begin with a small hybrid organization: on-premises call control, cloud-managed users, a remote site, cloud devices, and a staged migration plan. Document identity, call routing, device registration, security, and management ownership, then introduce failures at each boundary.
The important transition is conceptual as well as curricular. 300-820 has moved from a concentration centered on collaboration edge technologies toward one that validates the broader operating model of hybrid and cloud collaboration.
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