About this release
The Long Term Service Release (LTSR) program for Citrix Virtual Apps and Desktops provides stability and long-term support for XenApp/XenDesktop releases.
LTSRs are currently available for Citrix Virtual Apps and Desktops 7 1912 (this release), and for XenApp and XenDesktop Versions 7.6 and 7.15. If you are new to the LTSR program, you can install Citrix Virtual Apps and Desktops 7 1912 from scratch. If you are on one of the earlier LTSRs, you can upgrade from there, including from any Cumulative Update (CU). For additional information about supported upgrade paths, see the Upgrade Guide.
In addition, Citrix also recommends specific versions of Citrix Workspace app or Citrix Receiver and other components. While not required for LTSR compliance, upgrading to the recommended versions of those components ensures further ease of maintenance and the availability of the latest fixes in your deployment.
For an overview of the features in Citrix Virtual Apps and Desktops 7 1912 that have been added since earlier releases, see the Citrix Virtual Apps and Desktops Feature Summary Comparison table.
This Citrix Virtual Apps and Desktops release includes new versions of the Windows Virtual Delivery Agents (VDAs) and new versions of several core components. You can:
Install or upgrade a site
Use the ISO for this release to install or upgrade core components and VDAs. Installing or upgrading to the latest version allows you to use all of the latest features.
Install or upgrade VDAs in an existing site
If you already have a deployment, and aren’t ready to upgrade your core components, you can still use several of the latest HDX features by installing (or upgrading to) a new VDA. Upgrading only the VDAs is often helpful when you want to test enhancements in a non-production environment.
After upgrading your VDAs to this version (from version 7.9 or later), you do not need to update the machine catalog’s functional level. The 7.9 (or later) value remains the default functional level, and is valid for this release. For more information, see VDA versions and functional levels.
- If you are building a new site, follow the sequence in Install and configure.
- If you are upgrading a site, see Upgrade a deployment.
Citrix Virtual Apps and Desktops 7 1912 LTSR
Important notice about upgrading VDAs
If the Personal vDisk (PvD) component was ever installed on a VDA, that VDA cannot be upgraded to version 1912 LTSR or later. To use the new VDA, you must uninstall the current VDA and then install the new VDA.
This instruction applies even if you installed PvD but never used it.
Learn if you’re affected
How PvD might have been installed in earlier versions:
- In the VDA installer’s graphical interface, PvD was an option on the Additional Components page. The 7.15 LTSR and earlier 7.x releases enabled this option by default. So, if you accepted the defaults (or explicitly enabled the option in any release), PvD was installed.
- On the command line, the
/baseimageoption installed PvD. If you specified this option, or used a script that contained this option, PvD was installed.
If you don’t know whether your VDA has PvD installed, run the installer for the new VDA (1912 LTSR or later) on the machine or image.
- If PvD is installed, a message appears, indicating there is an incompatible component.
- For the graphical interface, click Cancel on the page containing the message, and then confirm that you want to close the installer.
- From the CLI, the command simply fails with the displayed message.
- If PvD is not installed, the upgrade proceeds.
What to do
If the VDA does not have PvD installed, follow the usual upgrade procedure.
If the VDA has PvD installed:
- Uninstall the current VDA. For details, see Remove components.
- Install the new VDA.
If you want to continue using PvD on your Windows 7 or Windows 10 (1607 and earlier, without updates) machines, VDA 7.15 LTSR is the latest supported version.
Install and upgrade: New user personalization layer component in single-session VDAs
When installing or upgrading a single-session VDA, you can include the user personalization layer component. This feature is powered by Citrix App Layering, On non-persistent machines, the feature preserves users’ data and locally installed applications across sessions.
This feature replaces Personal vDisk, which has been deprecated. If you are upgrading a VDA that previously had PvD installed, see Important notice about upgrading VDAs.
Install and upgrade: Microsoft Visual C++ Runtime 2017 prerequisite
When installing a Delivery Controller or Windows VDA, Microsoft Visual C++ Runtime 2017 is installed automatically if it (or a later supported version) is not already installed. This is a newer Visual C++ Runtime version than the version installed in earlier Citrix Virtual Apps and Desktops releases.
Install and upgrade: SQL Server Express version
When installing the first Delivery Controller, you can choose to have Citrix install Microsoft SQL Server Express on the same machine, for use as the site database. As of this release, for new installations, we install SQL Server Express 2017 with Cumulative Update 16. This is a newer version than in earlier Citrix Virtual Apps and Desktops releases. For upgrades, we do not upgrade any SQL Server Express version that is already installed.
When you install a Controller, Microsoft SQL Server Express LocalDB is installed automatically for use with Local Host Cache. (This installation is separate from the SQL Server Express used for the site database.) For a new installation, we install SQL Server Express LocalDB 2017 with Cumulative Update 16. This is a newer version than in earlier Citrix Virtual Apps and Desktops releases. For upgrades, we do not upgrade any SQL Server Express LocalDB version that is already installed.
Install and upgrade: Supported Windows 10 versions for VDAs
This release supports Windows 10 32-bit (x86) and 64-bit (x64) OSs. The 32-bit Windows 10 OS is not supported in the 1909 Current Release, There are currently no plans to support it in Current Releases after 1912 LTSR. For Windows 10 machines, Citrix recommends using 64-bit (x64).
Install and upgrade: Prevent pending reboot check
When installing or upgrading core components, the installer stops if it detects that a restart is pending from a previous Windows installation on the machine. Now, when using the command-line interface, you can prevent the check for a pending restart by including the
/no_pending_reboot_check option in the command. For more information, see During installation of any component.
VDAs and machine catalogs: Operating system name changes
Operating system names for VDAs and machine catalogs have changed.
Multi-session OS (formerly Server OS): The multi-session OS machine catalog provides hosted shared desktops for a large-scale deployment of standardized Windows multi-session or Linux OS machines.
Single-session OS (formerly Desktop OS): The single-session OS machine catalog provides VDI desktops ideal for a variety of different users.
Component version number: Change to on-premises value
In a product and component version number (YYMM.c.m.b), the value of c is 0 for an on-premises release. For example, in Apps & features, this version appears as 1912.0.0.build number.
In earlier on-premises releases, and in Citrix cloud releases, the value of c is 1.
For more information, see Product and component version numbers.
Support for provisioning Linux machines on Amazon Web Services
Citrix Studio now supports using Machine Creation Services (MCS) to provision Linux machines on Amazon Web Services (AWS). For more information, see Use MCS to create Linux VMs.
Virtual Delivery Agents (VDAs) 1912
Version 1912 of the VDA for Multi-session OS and the VDA for Single-session OS includes the following enhancements (in addition to the VDA installation and upgrade items listed previously in this article):
Although VDA version number displays indicate “Citrix Virtual Apps and Desktops 7 1912 LTSR”, the VDAs are supported for LTSR and CR deployments.
Support for Local Security Authority (LSA) protection
We now support the use of Local Security Authority (LSA) protection on a multi-session server OS and a single-session desktop OS for standard authentication, Federated Authentication Service (FAS) authentication, and Smart Card authentication. For more information about LSA protection, see the Microsoft article Configuring Additional LSA Protection.
This release introduces an add-on feature that enhances security when using Citrix Workspace app. New policies provide anti-keylogging and anti-screen-capturing capabilities in a session. The new policies along with Citrix Workspace app 1912 or later for Windows can help protect data from keyloggers and screen scrapers. For more information, see App protection.
Citrix Licensing 11.16.3
Citrix Federated Authentication Service 1912
Citrix Federated Authentication Service (FAS) 1912 contains new features.