Create a Custom Detection Script for Bicep CLI (PowerShell)

Microsoft Endpoint Manager Configuration Manager (MEMCM / SCCM) and Microsoft Intune use Detection Rules to determine the presence of Applications & Win32 Apps. The detection rules ensure that application installations only begin to run if the application is not already installed on the device. This article will serve as an informative guide and give you a clear understanding of how to create an updated custom detection script for each new version of Bicep CLI using PowerShell.

How to Create a Custom Detection Script for Bicep CLI

Bicep CLI (Registry Detection Method)

## Check for Bicep CLI (Registry Detection Method)
$BicepCLI = Get-ChildItem -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall" | Get-ItemProperty | Where-Object {$_.DisplayName -match 'Bicep CLI' } | Select-Object -Property DisplayName, DisplayVersion, PSChildName
$BicepCLI.DisplayVersion
$BicepCLI.PSChildName


## Create Text File with Bicep CLI Registry Detection Method
$FilePath = "C:\Windows\Temp\Bicep_CLI_Detection_Method.txt"
New-Item -Path "$FilePath" -Force
Set-Content -Path "$FilePath" -Value "Function Get-LoggedOnUserSID {"
Add-Content -Path "$FilePath" -Value "## ref https://www.reddit.com/r/PowerShell/comments/7coamf/query_no_user_exists_for/"
Add-Content -Path "$FilePath" -Value "## ref https://smsagent.blog/2022/03/03/user-context-detection-rules-for-intune-win32-apps/"
Add-Content -Path "$FilePath" -Value "`$header=@('SESSIONNAME', 'USERNAME', 'ID', 'STATE', 'TYPE', 'DEVICE')"
Add-Content -Path "$FilePath" -Value "`$Sessions = query session"
Add-Content -Path "$FilePath" -Value "[array]`$ActiveSessions = `$Sessions | Select -Skip 1 | Where {`$_ -match ""Active""}"
Add-Content -Path "$FilePath" -Value "If (`$ActiveSessions.Count -ge 1)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUsers = @()"
Add-Content -Path "$FilePath" -Value "`$indexes = `$header | ForEach-Object {(`$Sessions[0]).IndexOf("" `$_"")}"
Add-Content -Path "$FilePath" -Value "for(`$row=0; `$row -lt `$ActiveSessions.Count; `$row++)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$obj=New-Object psobject"
Add-Content -Path "$FilePath" -Value "for(`$i=0; `$i -lt `$header.Count; `$i++)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$begin=`$indexes[`$i]"
Add-Content -Path "$FilePath" -Value "`$end=if(`$i -lt `$header.Count-1) {`$indexes[`$i+1]} else {`$ActiveSessions[`$row].length}"
Add-Content -Path "$FilePath" -Value "`$obj | Add-Member NoteProperty `$header[`$i] (`$ActiveSessions[`$row].substring(`$begin, `$end-`$begin)).trim()"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUsers += `$obj"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUser = `$LoggedOnUsers[0]"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUserSID = Get-ItemProperty ""HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\SessionData\`$(`$LoggedOnUser.ID)"" -Name LoggedOnUserSID -ErrorAction SilentlyContinue |"
Add-Content -Path "$FilePath" -Value "Select -ExpandProperty LoggedOnUserSID"
Add-Content -Path "$FilePath" -Value "Return `$LoggedOnUserSID"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUserSID = Get-LoggedOnUserSID"
Add-Content -Path "$FilePath" -Value "If (`$null -ne `$LoggedOnUserSID)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "If (`$null -eq (Get-PSDrive -Name HKU -ErrorAction SilentlyContinue))"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$null = New-PSDrive -PSProvider Registry -Name HKU -Root HKEY_USERS"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$i = Get-Item ""HKU:\`$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\$($BicepCLI.PSChildName)"" -ErrorAction SilentlyContinue"
Add-Content -Path "$FilePath" -Value "if (`$null -eq `$i)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## Key Does NOT Exist"
Add-Content -Path "$FilePath" -Value """Key Does NOT Exist"""
Add-Content -Path "$FilePath" -Value "Exit 1"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "else"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$r = Get-ItemProperty ""HKU:\`$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\$($BicepCLI.PSChildName)"" -Name 'DisplayVersion' -ErrorAction SilentlyContinue |"
Add-Content -Path "$FilePath" -Value "Select -ExpandProperty 'DisplayVersion'"
Add-Content -Path "$FilePath" -Value "If (`$r -ge '$($BicepCLI.DisplayVersion)')"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## Installed"
Add-Content -Path "$FilePath" -Value """Installed"""
Add-Content -Path "$FilePath" -Value "Exit 0"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "else"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## Correct App Version NOT Installed"
Add-Content -Path "$FilePath" -Value """Correct App Version NOT Installed"""
Add-Content -Path "$FilePath" -Value "Exit 1"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "Else"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## No Logged on User Detected"
Add-Content -Path "$FilePath" -Value """No Logged on User Detected"""
Add-Content -Path "$FilePath" -Value "Exit 1"
Add-Content -Path "$FilePath" -Value "}"
Invoke-Item $FilePath
  • Click Run Script (F5)
  • A text file will open with the Bicep CLI Detection Method script required to detect the current version of Bicep CLI that is installed on the device you are running the script from.

Example:

Function Get-LoggedOnUserSID {
## ref https://www.reddit.com/r/PowerShell/comments/7coamf/query_no_user_exists_for/
## ref https://smsagent.blog/2022/03/03/user-context-detection-rules-for-intune-win32-apps/
$header=@('SESSIONNAME', 'USERNAME', 'ID', 'STATE', 'TYPE', 'DEVICE')
$Sessions = query session
[array]$ActiveSessions = $Sessions | Select -Skip 1 | Where {$_ -match "Active"}
If ($ActiveSessions.Count -ge 1)
{
$LoggedOnUsers = @()
$indexes = $header | ForEach-Object {($Sessions[0]).IndexOf(" $_")}
for($row=0; $row -lt $ActiveSessions.Count; $row++)
{
$obj=New-Object psobject
for($i=0; $i -lt $header.Count; $i++)
{
$begin=$indexes[$i]
$end=if($i -lt $header.Count-1) {$indexes[$i+1]} else {$ActiveSessions[$row].length}
$obj | Add-Member NoteProperty $header[$i] ($ActiveSessions[$row].substring($begin, $end-$begin)).trim()
}
$LoggedOnUsers += $obj
}
$LoggedOnUser = $LoggedOnUsers[0]
$LoggedOnUserSID = Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\SessionData\$($LoggedOnUser.ID)" -Name LoggedOnUserSID -ErrorAction SilentlyContinue |
Select -ExpandProperty LoggedOnUserSID
Return $LoggedOnUserSID
}
}
$LoggedOnUserSID = Get-LoggedOnUserSID
If ($null -ne $LoggedOnUserSID)
{
If ($null -eq (Get-PSDrive -Name HKU -ErrorAction SilentlyContinue))
{
$null = New-PSDrive -PSProvider Registry -Name HKU -Root HKEY_USERS
}
$i = Get-Item "HKU:\$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\{7EF9DE63-59B1-4325-955A-937F3E0A4EA8}_is1" -ErrorAction SilentlyContinue
if ($null -eq $i)
{
## Key Does NOT Exist
"Key Does NOT Exist"
Exit 1
}
else
{
$r = Get-ItemProperty "HKU:\$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\{7EF9DE63-59B1-4325-955A-937F3E0A4EA8}_is1" -Name 'DisplayVersion' -ErrorAction SilentlyContinue |
Select -ExpandProperty 'DisplayVersion'
If ($r -ge '0.14.85.62628')
{
## Installed
"Installed"
Exit 0
}
else
{
## Correct App Version NOT Installed
"Correct App Version NOT Installed"
Exit 1
}
}
}
Else
{
## No Logged on User Detected
"No Logged on User Detected"
Exit 1
}

Always make sure to test everything in a development environment prior to implementing anything into production. The information in this article is provided “As Is” without warranty of any kind.

Jason Bergner

I am an accomplished Software Engineer at Patch My PC, leveraging more than 18 years of hands-on experience in Configuration Manager administration and application packaging. I am driven by a genuine passion for solving complex problems and consistently strive to discover innovative and effective solutions. Sharing my extensive knowledge of application deployments is a true joy for me, and I am honored to contribute to the community here at Silent Install HQ.

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