Citrix Remote PC Access VDA registration fails after Windows 11 October 2026 CU – Administrator Protection identified as the trigger

After installing the September and October 2026 Windows cumulative updates, we started experiencing widespread Citrix Remote PC Access registration failures. Several workstations suddenly appeared as Unregistered in Citrix Studio, leaving users unable to access their PCs remotely.

After quite some troubleshooting, we finally identified Windows Administrator Protection as the trigger. While we have a reliable workaround, the underlying compatibility issue remains unresolved. Continue reading “Citrix Remote PC Access VDA registration fails after Windows 11 October 2026 CU – Administrator Protection identified as the trigger”

HowTo: Update to Roundcube 1.6.15

Time for another Roundcube update!

On 28.07.2022 the latest major Release Version 1.6.0 was released.
On 29.03.2026 the latest hotfix 1.6.15 was released. By now, it’s really time to install the update, isn’t it? 😉

Continue reading “HowTo: Update to Roundcube 1.6.15”

Configure Autodesk Desktop Connector to maintain login session on Citrix non-persistent VMs

Recently, we implemented CAD workstations through Citrix DaaS Standard for Azure. The customer uses AutoDesk 2023 products. To maintain the AutoDesk session on the non-persistent Azure MCS machines, we had to implement a Microsoft Loopback network adapter.

Introduction

During our latest Citrix project, we implemented Citrix DaaS Standard for Azure, to provide GPU powered Azure CAD workstations with AutoDesk 2023. One of the challenges to solve, was AutoDesk sessions persistence, so an engineer wouldn’t have to authenticate to AutoDesk over and over again.

AutoDesk provides a knowledge base article, about how this can be solved manually in a Citrix Golden Master Image. The solution is to create a Microsoft KM-TEST Loopback Adapter in the Golden Master Image.

How to configure Autodesk Desktop Connector to maintain login session on Citrix non-persistent VMs (autodesk.com)

For this project, we decided to create the Golden Master Image through a combined Azure DevOps + Packer approach. So we needed to translate this support article into PowerShell.
Continue reading “Configure Autodesk Desktop Connector to maintain login session on Citrix non-persistent VMs”

Install-Language breaks Citrix HDX Teams optimization on Azure Windows 10 Multi-User

While building a Citrix DaaS Standard for Azure environment, we made use of the new Install-Language PowerShell command. Sadly, this broke the Citrix HDX Teams optimization. In this article, I show you how to work around this issue.

Install-Language…

During this project, we decided to build our Citrix Master images through Packer of Microsoft marketplace images. These images are en-US only, and the administrator has to provide a language pack as needed. For this use-case, Microsoft has introduced a new PowerShell command in the latest builds of Windows 10 and Windows 11 multi-user: Install-Language

This command replaces everything from the past and can be used as a simple one-liner during your master image build process:

Install-Language -Language de-DE -CopyToSettings

…breaks the OS

But as far as we know, this is currently bugged. Continue reading “Install-Language breaks Citrix HDX Teams optimization on Azure Windows 10 Multi-User”

Scoring an A+ at SSLLabs.com with Citrix NetScaler – Q2 2023 update

In 2016 Ryan Butler created a PowerShell script to update a NetScaler configuration to score an A+ at the SSL Labs SSL test. I updated this script to score an A+ in 2023.

Credits

This blog post would not be possible without the groundwork from Ryan Butler and Carl Stalhood. Ryan created the initial script and Carl provided me with a current SSL cipher list for Q2 2023.

Updates and tests

Last year, I had a few new Citrix NetScaler Gateway VPX setups, and needed a fast way to get the SSL settings right. Most of the time I used the script by Ryan, but in the meantime it was outdated. I grabbed the script and the provided SSL cipher list by Carl and got a working copy that immediately scored an A+ at SSL Labs. Sadly, I did not take my time to create a pull request over at Ryan’s GitHub to give back. Today I took my time, to tidy up the code, thanks to the Visual Studio Code PowerShell formatter and write up the changelog. Continue reading “Scoring an A+ at SSLLabs.com with Citrix NetScaler – Q2 2023 update”