After installing Citrix Workspace 1809 or above version in Windows 10, Citrix indirect display adapter is installed automatically.

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Instructions

This is expected behavior by design.

• Citrix casting feature is introduced from the version of Citrix Workspace 1809.
• This feature needs a driver called the indirect display driver to function.

Also, the following information can be found from the Workspace installation log:
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MSI (s) : Dir (target): Key: DIR_vidd, Object: C:\Program Files (x86)\Citrix\ICA Client\Citrix Screen Casting for Windows\vidd\
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* DIR_vidd is the driver of indirect display adapter.