Operations | Monitoring | ITSM | DevOps | Cloud

One of the hot topics from our recent Citrix-focused webinar was the Citrix License Activation Service (LAS). I had the chance to present alongside George Spiers— Citrix Expert and EUC Architect —and we walked through what LAS is, how it works, and what teams should be aware of.

Citrix has been transitioning products toward License Access Service (LAS) as the modern licensing method. Unlike traditional file-based licensing, LAS introduces service-based communication between products and the Citrix License Server. As of 15 April 2026, LAS becomes the mandatory licensing method for supported products. Environments still relying on file-based licensing will need to transition before that date.

As part of our day-to-day consulting work at GripMatix, we spend a significant amount of time in various customer environments where we are designing, validating, and troubleshooting EUC platforms. This particular issue surfaced during work for one of our customers, where we were validating Ivanti Workspace Control (IWC) on a new Windows Server 2025 environment.

The customer was already using Citrix Provisioning Services (PVS) to deliver Virtual Delivery Agent (VDA) machines. Rather than attempting to migrate existing VMware-based VDAs, which often introduces driver conflicts and legacy dependencies, we followed a proven best-practice approach. We provisioned new VDA machines directly on XenServer using the PVS Virtual Desktop Setup Wizard. This ensured clean builds, free from VMware-specific components, and fully optimized for the XenServer platform.

Citrix XenServer is increasingly becoming the strategic hypervisor of choice for organizations running Citrix VAD and DaaS workloads. With XenServer Premium Edition now included in Citrix subscriptions, it offers a more aligned, predictable, and cost-effective platform, without compromising on stability, performance, or capabilities. A critical part of enabling that transition is delivering the right level of monitoring and operational control.

In our previous blog post, we outlined why Citrix VAD/DaaS customers using VMware should consider migrating to XenServer. With Citrix now officially supporting XenServer for non-Citrix workloads and Broadcom’s recent licensing changes, many organizations are reevaluating their virtualization strategy.

For years, VMware vSphere was the undisputed leader in enterprise virtualization. Its reliability, feature set, and ecosystem made it the go-to hypervisor for organizations. Also for organizations running Citrix Virtual Apps and Desktops (VAD) or Citrix DaaS, VMware was synonymous with virtualization excellence. But the landscape has changed, dramatically. If you're still running your Citrix workloads on VMware, it's time to take a serious look at XenServer, and here's why.

Slow logons, laggy VDI sessions, and poor Horizon performance are common pain points IT admins face frequently. When Omnissa Horizon environments slow down, both end-users and IT teams feel the pressure—users grow frustrated while admins struggle to troubleshoot without complete visibility. To uncover the real-world Horizon issues admins face, we turned to Reddit forums like r/VMwareHorizon, r/sysadmin, and r/Citrix, where IT professionals openly share their Horizon troubleshooting struggles.

Even a simple upgrade can cause unexpected issues. Here’s what happened when a PVS upgrade broke XenServer licensing, and how we fixed it.

MetrixInsight for Citrix VAD/DaaS surpasses Citrix Director/Monitor in many ways. Director/Monitor is useful for day-to-day visibility, but it is not a true enterprise monitoring platform. MetrixInsight adds much more, also when it comes to alerting and enterprise monitoring. It closes important gaps that can directly impact user experience when capacity or performance issues slip through unnoticed. One clear example is how operational VDA capacity is handled.