Citrix App Layering 4.x: PVS Connector Script to Convert VHD to VHDX

Introduction When publishing an image to PVS the Citrix App Layering PVS Connector allows for running a PowerShell script after an image in uploaded to the PVS Store and Added as a vDisk. This sample script is intended to show Citrix customers how this scripting can be used to increase...

App Layering - Throttling in Azure / Server Busy

Understanding what to do when encountering throttling limits in Azure when using App Layering...

FSLogix Profile Disk not created or used in App Layering when Elastic Layers are enabled

When using FSLogix with Elastic or User Layers, you find that the FSLogix profile is not created for new users. For existing users who already have an existing profile, new data is not written to it...

App Layering Recipe: How to deploy Microsoft SCCM in a layer

...

Citrix App Layering - Error while trying to import layers

While trying to import layers, App Layering console displays an error: "An unexpected exception occurred. If this problem continues, contact Technical Support and provide them with the details of this exception". Looking at the ELM Web logs, we might see the below errors: ERROR 2832HandlerHelper:...

Manual generation of the App Layering agent self-signed certificate

Replace the self signed certificate which expires 2 years post agent installation...

OS Layer Finalize fails with error "It looks like the packaging Machine has never been powered on".

While finalizing an OS layer edit in the App Layering appliance, you receive an error,"It looks like the packaging Machine has never been powered on." Can see the below error in ELM logs: 2019-11-01 09:53:36,890 ERROR 27 CpTaskResultMessag: Got Error type GlobalizedError. FailureReason: It looks...

App Layering - How to reset Windows 10 Store Apps in User Layer

...

nVidia control panel fails to launch in platform layer or published image

When configuring a platform layer for a vGPU, the nVidia control panel may fail to launch. The driver may be working or it may fail with code 31 or code 43, but thenVidia control panel itself will not open. You may see an event in the Windows Application event log about nvcplui.exe crashing. The...

Office Activation is broken in an App Layering vDisk in PVS if you version the disk or boot it in Private Mode

This article only applies to App Layering 29.1 and before. In 19.2, the mechanism for getting the correct license changes to make it happen in the ELM, before the image boots. So you no longer need to worry about versioning your published image vDisk when Office is installed. When you initially...

Best Practice: SFC(System File Checker) use in App Layering

Where to execute an sfc check? The best practice is to execute the SFC tool in the Gold Image, prior to creating your first OS Layer. This should ensure the future OS layers are free of Windows file corruption. When needed, a version can be removed and a new version created. Other options are, in...

User getting App Layering error at logon- "This system was not shutdown properly"

When a domain user logs on to an image that has been published by App Layering and the image has User Layers enabled, they may receive an error...

App Layering does not support downgrading the ELM

I just upgraded my ELM, and I'm having problems. How do I downgrade?...

Windows Store and Sideload apps don't work after reboot when User Layers enabled

A Windows Store or local Sideload app or some other AppX package installs and works fine immediately after installation, when User Layers are enabled in App Layering. However, after a restart, the program fails to start, or flashes a window and immediately terminates...

Unexpected Error editing a layer, "The given key was not present in the dictionary."

You may find yourself unable to edit layers or publish images. These tasks fail in the App Layering Management Console with a cryptic message,"The given key was not present in the dictionary."...

How to use Citrix App Layering with Fixed IP Addresses

In App Layering, the ELM needs to be able to determine which NIC device is the "active" NIC. The ELM must determine the active NIC in orderto properly merge network instances and services from different layers, howeverthere's no flag in the registry that identifies the NIC that will be used to...

Setting Azure Accelerated Networking on an ELM deployed before version 4.13

Prior to App Layering 4.13, the ELM was provisioned with a NIC that did not have Azure Accelerated Networking enabled. This feature was not fully supported by Microsoft on Linux guests prior to this point. Please note that upgrading to App Layering 4.13 will NOT change the NIC configuration. The...

Citrix App Layering - Management Appliance or ELM is out of disk space, what can you delete?

You may get e-mail or system, task notifications from the MA or ELM you are running out of disk space. 2. You may have an unresponsive Unidesk Management Console, To verify 1. 1.open ALMC gui 2. Login as root and use the "df" command to determine that you are out of space. -Unidesk sample-...

Default credentials

It was discovered that rpm-ostree and rpm-ostree-client before 2017.3 fail to properly check GPG signatures on packages when doing layering. Packages with unsigned or badly signed content could fail to be rejected as expected. This issue is partially mitigated on RHEL Atomic Host, where certifica...

CVE-2017-2623

The CVE-2017-2623 issue affects rpm-ostree and rpm-ostree-client older than 2017.3, where GPG signatures on layered packages were not checked properly. This could allow unsigned or poorly signed content to be accepted instead of rejected. The severity and impact are described in multiple sources ...