Citrix Cloud Solutions — Desktop as a Service
Citrix DaaS is the platform at the heart of most enterprise Citrix deployments. It virtualises applications and desktops inside your data centre or cloud, and delivers them to any device over Citrix's proprietary HDX protocol — so users get a rich, responsive experience and your data never leaves the boundary you define. The control plane is managed entirely by Citrix in the cloud. Your workloads stay exactly where you need them.
How It Works
The fundamental architecture of Citrix DaaS separates the control plane from the workloads — Citrix manages the orchestration layer in the cloud, while your applications and desktops run wherever your business requires them to.
Citrix Cloud — Managed by Citrix
Citrix manages the Delivery Controllers, brokering database, Citrix Studio (web console), Citrix Monitor, and licensing entirely in the cloud. There are no infrastructure components for you to deploy, patch, or maintain at the control layer. Citrix handles redundancy, updates, and availability — your administrators manage policies and resources through a browser-based Studio portal, not servers.
Cloud Connectors — Deployed by OAS
Cloud Connectors are lightweight Windows servers installed at each resource location. They act as the secure, outbound-only communication channel between your on-premises or cloud workloads and the Citrix Cloud control plane. No inbound firewall ports are required. A minimum of two per resource location provides high availability, with Local Host Cache (LHC) enabling continued session brokering even if cloud connectivity is temporarily interrupted.
Virtual Delivery Agents — Your Workloads
Virtual Delivery Agents (VDAs) are installed on the Windows or Linux machines — physical or virtual — that host your applications and desktops. These machines live in your resource locations: your data centre, Azure, AWS, Google Cloud, or any combination. The VDA registers with Citrix Cloud via the Cloud Connector and handles the HDX session with the end user's device directly.
Why It Matters
Citrix DaaS has been ranked first by Gartner across all four DaaS use cases for three consecutive years. The platform's advantage is measurable — in operational savings, user experience, security, and deployment flexibility.
Platform Capabilities
Six capabilities that make DaaS the right platform for organisations delivering applications at scale — across diverse device types, multiple locations, and complex user populations.
Citrix HDX (High Definition Experience) is the proprietary protocol that carries application sessions from the VDA to the user's device. It adapts in real time to available bandwidth, latency, and packet loss — maintaining a responsive, visually accurate session even on constrained or congested connections. HDX supports adaptive transport over UDP/DTLS for low-latency scenarios, and handles specialist peripherals including Bloomberg keyboards, dictation devices, webcams, USB redirection, and GPU-intensive workloads with full fidelity.
ICA/HDX Adaptive Transport
Machine Creation Services (MCS) is Citrix's provisioning engine — it creates and manages pools of virtual machines from a single master image across any supported hypervisor or cloud platform. Changes to the master image are published to the entire pool at the next reboot. MCS supports persistent VDI (assigned desktops), non-persistent pooled desktops (where the machine resets at logoff), and multi-session RDS servers — with Autoscale powering machines on and off based on schedule or load to control cloud infrastructure costs.
MCS · Autoscale
In non-persistent desktop environments, user settings, application preferences, and personal files must travel with the user — not stay on the machine. Citrix Profile Management captures and synchronises user profiles to a central file share or cloud storage, ensuring that regardless of which pooled desktop a user lands on, their environment is consistent and personalised. Profile Management integrates with Microsoft FSLogix for Office 365 container support, covering Outlook OST files, OneDrive, and Teams caches in pooled deployments.
Profile Management · FSLogix
Citrix Studio is the web-based administration console for the entire DaaS environment — machine catalogues, delivery groups, policies, image management, and hosting connections are all configured here. Citrix Monitor provides real-time session visibility, logon performance analysis, historical trending, and the ability to shadow or disconnect user sessions remotely. Both are cloud-hosted by Citrix, require no local infrastructure, and receive new capabilities automatically with each platform update.
Studio · Monitor · Director
HDX policies govern exactly what users can and cannot do within a virtual session — clipboard direction (copy/paste in or out), client drive mapping, USB device access, printer redirection, watermarking, session recording, and screen capture prevention. Policies are applied through Group Policy or Citrix Studio and can be scoped to specific delivery groups, users, or device types — providing precise, auditable control over data movement within every application session.
Data Leak Prevention · Policy Control
Citrix Analytics for Performance uses machine learning to quantify user experience across every session and every site — generating a User Experience Score that makes performance visible at a glance. It identifies the root cause of logon delays, application launch failures, and session instability, and surfaces proactive alerts before users raise support tickets. Analytics spans all resource locations simultaneously, giving your OAS team a single view of experience quality across your entire Citrix estate.
Performance Analytics · UX Score
Flexible Deployment
A resource location is anywhere you install Cloud Connectors and place VDA workloads. Citrix DaaS supports multiple resource locations simultaneously — each managed from the same Studio console, with the same policies, monitoring, and user workspace. Your data stays where you need it; Citrix handles everything else.
Flexible Deployment
Data sovereignty is a key consideration under POPIA. Citrix DaaS's resource location model means your application workloads and data remain in South Africa — in your own data centre or a local cloud region — while Citrix manages the global control plane. You meet your data residency obligations without sacrificing the operational benefits of cloud-managed infrastructure.
Identity & Authentication
Citrix DaaS integrates natively with Microsoft Entra ID (formerly Azure Active Directory) for authentication, device identity, and conditional access — giving organisations that have invested in Microsoft 365 a consistent, unified identity experience across their virtual workspace.
Citrix DaaS supports full Microsoft Entra SSO — users who authenticate to Citrix Workspace with their Entra ID credentials are passed through to their virtual applications and desktops without a second login prompt. The Federated Authentication Service (FAS) issues short-lived, digitally signed user certificates at session launch, eliminating the need for users to re-enter credentials at the Windows logon screen of the VDA. SSO works across Windows, Linux, and macOS VDAs, and with Workspace app for Linux from version 2601.
Citrix Workspace uses Entra ID as an identity provider, which means Entra Conditional Access policies and MFA requirements apply natively at the point of Workspace authentication. Users are challenged for MFA (via the Microsoft Authenticator app, SMS, TOTP, or hardware token) before access to any virtual application or desktop is granted. Conditional Access policies can enforce MFA based on user location, device compliance state, or application sensitivity — giving you the same access governance for your virtual workspace as for your Microsoft 365 applications.
Citrix DaaS supports machine catalogues where VDAs are Microsoft Entra joined — not domain-joined to on-premises Active Directory. This is particularly relevant for organisations migrating away from on-premises AD, or deploying cloud-native desktop pools in Azure where no domain controller is present. Entra-joined VDAs are provisioned using MCS, managed through Microsoft Intune for device compliance, and support Hybrid Entra join for environments in transition between on-premises AD and cloud-only identity.
When users connect from outside the corporate network, HDX sessions are secured and proxied through the Citrix Gateway Service — a globally distributed cloud service that connects users to the nearest point of presence and routes the HDX session to their resource location. The Rendezvous Protocol allows the HDX session to bypass the Cloud Connector and connect directly to the Gateway Service, reducing connector load and data centre footprint. Internal users on the corporate network connect directly to VDAs without traversing the gateway.
How It's Delivered
OAS has 40+ years of enterprise IT experience and deep Citrix expertise. We design, deploy, and operate your DaaS environment — from initial architecture through day-to-day management, monitoring, and incident response.
OAS designs your DaaS environment from the ground up — resource location strategy, Cloud Connector sizing, MCS catalogue design, Autoscale configuration, Entra ID integration, and HDX policy framework — ensuring the platform is correctly engineered for your user populations and application mix from day one.
Expert Design
OAS monitors your Citrix environment continuously via Citrix Monitor and Analytics for Performance — tracking session health, logon times, VDA registration, and resource utilisation. Issues are identified and resolved proactively, before users experience disruption.
Always On
OAS manages the full VDA image lifecycle — OS patching, application updates, MCS image publishing, and VDA version upgrades via the VDA Upgrade Service. Your desktop pool stays current, secure, and consistent without impacting production users during business hours.
Fully Managed
When something goes wrong — a VDA registration failure, a Cloud Connector outage, an Entra ID authentication issue, or a degraded user experience — OAS responds immediately, investigates root cause, and restores service. We are your first call, not your last resort.
Expert Support
The Citrix Solution Series
Citrix DaaS is the core of the Citrix portfolio — the platform that virtualises applications and desktops and has been the industry standard for secure application delivery for over 30 years. It works alongside Secure Private Access for ZTNA-based access, XenServer as the preferred hypervisor for on-premises workloads, and uberAgent for deep performance monitoring — all deployed and managed by OAS as a unified, enterprise-grade workspace.
Speak to an OAS consultant about Citrix DaaS — whether you are virtualising your first application estate, migrating from a legacy Citrix on-premises deployment, or exploring hybrid resource locations.
