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downloadWhy can't I download this file?Note:
You can hide all or part of the Advanced Preferences sheet available from the Citrix Workspace app icon in the notification area. For more information, see Hiding the Advanced Preferences sheet.
  1. Right-click Citrix Receiver for Windows from the notification area.
  2. Select Advanced Preferences and click DPI settings. The DPI settings dialog appears.
  3. Change the settings as required. By default, the option Let the operating system scale the resolution is selected.
  4. Click Save.
  5. Restart the Citrix Receiver for Windows session for the changes to take effect.

Use cases

There are three possible settings for DPI Scaling in the receiver, Scaled, Unscaled and Operating system Scaling. The use cases for the different settings are as follows:
Use case: Operating System Scaling (also known as DPI scaling)
OS scaling is the default and is identical in behavior to previous receiver versions. This corresponds to the UI setting “Let the operating system scale the resolution”, or the High DPI policy set to disabled. This lets Windows handle all DPI scaling. The resolution on the VDA will be scaled and based on the DPI, resulting in a smaller resolution than the client device. This works well for single monitor sessions, and is efficient when connecting to XenApp 6.5 hosts, or supported XenApp/XenDesktop VDAs configured for Legacy Graphics.
This method does not support Mixed DPI; all monitors must have the same DPI or the session will not work. Scaling can cause blurriness in the images, particularly in the case of text. This setting is recommended for users on Windows 7 endpoints if DPI matching is not possible, or those connecting to Legacy VDAs. It can also be used on Windows 10 if there is no Mixed DPI.Citrix Web App
Enhancements to the Operating System scaling since Receiver for Windows 4.10
Citrix Workspace app (CWA) for Windows version 1808

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CWA for Windows version 1808 provides improvements in graphics quality for sessions using legacy graphics mode (GDI graphics mode), when DPI Scaling is enabled on the client.
Note: The Legacy graphics mode HDX policy can be used for any currently supported Server OS VDA version that supports Windows Server 2008 R2.
The feature enhancement leverages DirectX 11-based scaling on the client where CWA for Windows version 1808 is installed. Because of this, this feature enhancement is not available for Windows 7 client endpoints; as Windows 7 does not support DirectX 11.
Graphics quality improvements will also be seen in double-hop scenarios. Refer to the list below for use cases that support this feature enhancement:
Single-hop
Client endpoint OS: Supported versions of Windows 10 with CWA for Windows installed and DPI Scaling enabled.
VDA OS: Windows Server 2008 R2.
Double-hop
Client endpoint OS: Supported versions of Windows 10 with CWA for Windows installed and DPI Scaling enabled.
1st hop VDA OS: Citrix support versions of Windows 10 with CWA for Windows installed and DPI Scaling enabled.
2nd hop VDA OS: Windows Server 2008 R2.
Notes:
DPI scaling functionality is supported with HDX Windows media redirection, Flash redirection and Browser content redirection features with XenApp and XenDesktop 7.16 (and higher versions).

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Use case: Scaled (also known as client scaling)
The Scaled setting will scale the resolution on the VDA similarly to OS Scaling, however this setting will support mixed DPI scenarios. This corresponds to the UI setting “Yes”, or the High DPI policy set to enabled and the option for “Scale the session for high resolution” set to “Yes”. This setting works well for mixed DPI scenarios when connecting to supported XenApp & XenDesktop and Citrix Virtual Apps & Desktops VDAs. This is the only way to scale Seamless sessions with mixed DPI.
Considerations when using Scaled configuration:
  • Scaling can cause blurriness in the images, particularly in the case of text.
  • There can be poor performance when connecting to Legacy VDAs (XenApp 6.5, or supported VDAs configured for Legacy Graphics).
  • Local App Access, RTOP, and other plugins that use the window positioning API do not work with Scaling.
  • Seamless apps will “jump” between monitors in this mode to maintain correct scaling, this is by design.
Web
This setting is recommended for users on Windows 10 endpoints connecting to currently supported VDAs. It supports mixed DPI without any additional impact on server resources.
Use case: Unscaled (includes DPI matching feature)
This corresponds to the UI setting “No”, or the High DPI policy set to enabled and the option for “Scale the session for high resolution” set to “No”.
This setting should not cause any blurriness due to scaling because the full-unscaled resolution of all monitors is sent to the session.
Enabling the unscaled setting will create sessions with higher resolution (as compared to scaled sessions), which can impact server performance and scalability, as well as increased bandwidth usage over the HDX connection. For this reason, customers will need to decide whether configuring for unscaled or scaled is more suited to their needs.
This setting is recommended for desktop sessions requiring the best image quality, where the additional server resource usage is acceptable.
Unscaled with DPI matching
The desktop session will launch with a DPI value that matches the DPI value of the endpoint monitor on which the session displays. This will result in text, icon and other object sizes in the desktop session matching that of the endpoint’s monitor.
It is also possible for users to change the endpoint monitor’s DPI value mid-session, which will correspondingly change the desktop session’s DPI value to match. Doing so will also change the desktop session’s display resolution.
Requirements:
  • Endpoint: Windows 7 or Windows 10 with minimum Citrix Workspace app for Windows 1811 installed.
  • VDA: Windows 10 with minimum VDA version 1811 installed.

Limitations:
  • The DPI matching feature is only supported for desktop sessions; seamless sessions are not supported.

Unscaled without DPI matching
When DPI matching is not possible, the unscaled setting will still mean the full resolution is sent but without DPI matching. This can result in small text and icons in apps and desktop sessions.
The DPI can still be set within the VDA after session launch, resulting in the desired text and icon sizes, though this is not possible on RDS desktops, or seamless applications.
Requirements:
  • Endpoint: Windows 7 or Windows 10 with minimum Receiver for Windows 4.10 installed (4.11 recommended to resolve some display issues).
  • VDA: Currently supported VDA versions on supported Windows Server OS and Desktop OS versions.

Limitations:
  • Even with one of the High DPI settings enabled, a slight blur has been observed in the desktop viewer UI.
  • In a session, when you change the DPI settings and relaunch it, the size of the session window might not be appropriate. As a workaround, resize the session window.

Additional Resources

downloadWhy can't I download this file?

Solution

In recent releases of IE, Edge, Google Chrome, Firefox, and latest Citrix Workspace App clients many of the issues mentioned below have been resolved.
By default, the OS (Windows, Mac, Linux) should automatically set how to open '.ica' files when trying to launch any resource via Citrix Workspace or Citrix Storefront via the Web Store if the Citrix Workspace App is installed properly.
Confirm Citrix Workspace App is installed or use Citrix Workspace App for HTML5 ('Web Browser' option) instead.
If you continue to encounter this behavior please review the steps outlined below.

There can be a number of resolutions to the issue including but not limited to the following:

Install the Latest Version of Citrix Workspace App

Install the latest Citrix Workspace App version which can be downloaded here: Download Citrix Workspace App

Automatically Open ICA Files

When clicking on an application or desktop to launch via Citrix Workspace or Citrix Storefront on an Internet Browser (not within Citrix Workspace App) and an '.ica' file shows in the download bar on the bottom left please follow these steps to automatically open said file:
ICA file is downloaded during the process. After the ICA file is downloaded, enable the browser to open similar files automatically.
Note: Instructions below are similar for other OS's when using Google Chrome, Firefox, or Edge Browsers.

Internet Explorer:
  1. Navigate to the Citrix Workspace Store or Citrix Storefront Store
  2. Select the resource you are trying to access - Application or Desktop
  3. You will receive a notification on the bottom of the browser to 'Open, Save, Cancel'
  4. Select the Save.
  5. The download bar will now show to 'Open, Open Folder, View Downloads',
  6. Select the drop-down list next to 'Open' and select 'Open With'
  7. Find and select 'Connection Manager'
Google Chrome:
  1. Navigate to the Citrix Workspace Store or Citrix Storefront Store
  2. Select the resource you are trying to access - Application or Desktop
  3. Chrome will prompt a dialog box to save the '.ica' file
  4. Hit save to save it in the 'Downloads folder'
  5. On the bottom left you will see the file, click the '^' which is the drop-down list for the file in the download bar and select 'Always Open Files of This Type'
Firefox:
  1. Navigate to the Citrix Workspace Store or Citrix Storefront Store
  2. Select the resource you are trying to access - Application or Desktop
  3. Firefox will prompt you with a dialog box to save the '.ica' file
  4. Select 'Do this automatically for files like this from now on'
  5. Select 'Open With' and click 'Browse'
  6. Select 'Connection Manager'
Edge Browser:
  1. Navigate to the Citrix Workspace Store or Citrix Storefront Store
  2. Select the resource you are trying to access - Application or Desktop
  3. Edge automatically saves the file to the downloads folder by default
  4. On the bottom left you will see the file, click the '...' which is the drop-down list for the file in the download bar and select 'Always Open Files of This Type'

Associate .ica File Type With Citrix Connection Manager

  1. On Windows computers, go to Control Panel > Settings > Apps > Default apps > Choose default apps by file type

  2. Under Name, find .ica file type.

  3. Ensure that the current default is set to Citrix Connection Manager. If not, click Change program and choose Citrix Connection Manager.

Note: Connection Manager is the wfcrun32 file located as C:Program Files (x86)CitrixICA Clientwfcrun32.exe

Remove or Disable Third Party Browser Adware

Remove or disable any third party browser based Adware software that could be interfering with the successful launch of the ICA file. Restart the browser after removing these software and try again.

Clear the 'Do not save encrypted data to disk' Option

If you are using Internet Explorer, click Tools > Internet Options > Advanced tab and clear the option “Do not save encrypted data to disk.”. This option should be cleared because the dynamic files are stored in the Temporary Internet Files folder. When applications are clicked, a file is downloaded to the folder, then launched using MIME type. If access to the folder is disabled or not available, the process cannot occur successfully.

Below are for older Browser/Citrix Receiver Deployments:

No longer recommended to perform these steps in newer releases of Internet Browsers. Steps remain for any users not fully updated to the latest and greatest.

Add Website to Trusted Sites

Add the site to the Trusted sites list if using Internet Explorer browser using the following steps:

  1. Go to Tools > Internet Options > Security tab > Sites

  2. In the Add this website to the zone field, enter your organization's website and click Add.

  3. Repeat this for the .com, .net, .org, or .gov Web site addresses of your organization to allow the use of the ActiveX ICA client object for the launched connection to be automatically accepted.
    Note: It might be required to also add any additional subdomain.domain.com URLs to the Trusted sites list in the Security tab setting if still experiencing unwanted prompts.

Disable ActiveX Filtering (Enable ActiveX)

Caution! Refer to the Disclaimer at the end of this article before using Registry Editor.

Configure Internet Explorer as follows to allow successful application launching:

  1. Disable ActiveX filtering feature for the Web Interface site, either by:
  • Disabling ActiveX filtering globally:
    Click Gear icon, select Safety, de-select ActiveX Filtering. Alternatively, press Alt key and click Tools menu (ActiveX filtering is enabled if a “tick” appears next to it and is disabled if the “tick” disappears).

    Or

  • Disabling ActiveX filtering for an individual site when ActiveX filtering is enabled globally:
    1. Log on to the Web Interface site and attempt to launch an application. At the end of the address bar a blue warning sign appears, indicating filtered content.

    2. Click the blue warning sign and select Turn off ActiveX Filtering.

  1. Enable ICA launch using one of the following options:
  • Add the site to the Trusted sites list: In the Security tab of Internet Options, add the Web Interface site to Trusted Sites list to allow the use of the ActiveX ICA client object for the launch.

    Or

  • Disable the MIME filter: Rename the following registry key: HKEY_CLASSES_ROOTPROTOCOLSFilterapplication/x-ica

  1. Log off and close window then restart the browser after making this change.

Enable Citrix ICA Client plugin

Configure Internet Explorer as follows to allow successful application launching:

  1. Enable Citrix ICA Client IE plugin by following the steps below:
    • Launch Internet Explorer
    • Go to Tools > Manage add-ons
    • Select Citrix ICA Client plugin and click Enable

Problem Cause

There can be a number of reasons for the issue including but not limited to:

  • The *.ica file on the client needs to be associated with Citrix Workspace App
  • Outdated Internet Browsers in use

Additional Resources

  • CTX139939 - Microsoft Internet Explorer 11 - Citrix Known Issues

  • CTX200889 - Receiver for Web Workaround with NPAPI Support Removal in Google Chrome

  • CTX126653 – Citrix Online Plug-in for Windows with Internet Explorer 9 Support

  • Citrix Discussions - IE 11 (Website cannot find required software)

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Disclaimer

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Caution! Using Registry Editor incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.