Existing USB Devices

Citrix Workspace App

Supported on: All Citrix Workspace supported platforms

Description

Choose what happens to available USB devices when a session is started. This setting overrides the user's preference.

Registry

HKLM Software\Policies\Citrix\ICA Client\USB

More options available

Options

When desktop starts

ExistingDevices enum

Connect all available USB devices -> Always
Display message and let user choose -> Ask
Do nothing -> Ignore (default)

REG Builder

BETA

Configure the state and elements to generate .reg, PowerShell, Intune, and SCCM outputs.

These exports replicate the policy's registry effect. Editing the registry directly is not the same as applying the GPO through the management console (no gpupdate, no central reporting). Test before production; HKLM changes require administrator rights.

Not configured Enabled Disabled

When desktop starts

.reg file

Windows Registry Editor Version 5.00

; Exported from gporais.com
; Policy: Existing USB Devices
; State: Enabled
; Supported on: All Citrix Workspace supported platforms

[HKEY_LOCAL_MACHINE\Software\Policies\Citrix\ICA Client\USB]
"ExistingDevices"="Ignore"

PowerShell

# Exported from gporais.com
# Policy: Existing USB Devices
# State: Enabled
# Supported on: All Citrix Workspace supported platforms

$path = 'HKLM:\Software\Policies\Citrix\ICA Client\USB'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ExistingDevices' -Value 'Ignore' -Type String

Intune XML

No direct Policy CSP / OMA-URI mapping for this policy. Use the Intune Remediation tab, or ingest the ADMX in Intune.

Intune Remediation

# === Detection script ===
# Exported from gporais.com
# Policy: Existing USB Devices
# State: Enabled
# Supported on: All Citrix Workspace supported platforms

function Test-RegistryValue {
  param(
    [Parameter(Mandatory = $true)][string]$Path,
    [Parameter(Mandatory = $true)][string]$Name,
    [object]$Expected,
    [ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
    [switch]$Absent
  )

  try {
    $item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
  } catch {
    return $Absent.IsPresent
  }

  if ($Absent.IsPresent) { return $false }
  $actual = $item.$Name

  if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
  if ($Kind -eq 'MultiString') {
    $actualValues = @($actual)
    $expectedValues = @($Expected)
    if ($actualValues.Count -ne $expectedValues.Count) { return $false }
    for ($i = 0; $i -lt $expectedValues.Count; $i++) {
      if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
    }
    return $true
  }

  return [string]$actual -eq [string]$Expected
}

$checks = @(
  (Test-RegistryValue -Path 'HKLM:\Software\Policies\Citrix\ICA Client\USB' -Name 'ExistingDevices' -Expected 'Ignore' -Kind String)
)

if ($checks -notcontains $false) {
  Write-Output 'Compliant'
  exit 0
}

Write-Output 'Non-compliant'
exit 1

# === Remediation script ===
# Exported from gporais.com
# Policy: Existing USB Devices
# State: Enabled
# Supported on: All Citrix Workspace supported platforms

$path = 'HKLM:\Software\Policies\Citrix\ICA Client\USB'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ExistingDevices' -Value 'Ignore' -Type String

SCCM CI

# Exported from gporais.com
# Policy: Existing USB Devices
# State: Enabled
# Supported on: All Citrix Workspace supported platforms
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.

# === Detection script ===
# Exported from gporais.com
# Policy: Existing USB Devices
# State: Enabled
# Supported on: All Citrix Workspace supported platforms

function Test-RegistryValue {
  param(
    [Parameter(Mandatory = $true)][string]$Path,
    [Parameter(Mandatory = $true)][string]$Name,
    [object]$Expected,
    [ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
    [switch]$Absent
  )

  try {
    $item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
  } catch {
    return $Absent.IsPresent
  }

  if ($Absent.IsPresent) { return $false }
  $actual = $item.$Name

  if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
  if ($Kind -eq 'MultiString') {
    $actualValues = @($actual)
    $expectedValues = @($Expected)
    if ($actualValues.Count -ne $expectedValues.Count) { return $false }
    for ($i = 0; $i -lt $expectedValues.Count; $i++) {
      if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
    }
    return $true
  }

  return [string]$actual -eq [string]$Expected
}

$checks = @(
  (Test-RegistryValue -Path 'HKLM:\Software\Policies\Citrix\ICA Client\USB' -Name 'ExistingDevices' -Expected 'Ignore' -Kind String)
)

if ($checks -notcontains $false) {
  Write-Output 'Compliant'
  exit 0
}

Write-Output 'Non-compliant'
exit 1

# === Remediation script ===
# Exported from gporais.com
# Policy: Existing USB Devices
# State: Enabled
# Supported on: All Citrix Workspace supported platforms

$path = 'HKLM:\Software\Policies\Citrix\ICA Client\USB'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'ExistingDevices' -Value 'Ignore' -Type String