Public/Get-CCMGUID.ps1
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function Get-CCMGUID { <# .SYNOPSIS Returns the current client GUID .DESCRIPTION This function will return the current GUID for the MEMCM client using CIM. .PARAMETER CimSession Provides CimSessions to gather the GUID from .PARAMETER ComputerName Provides computer names to gather the GUID from .PARAMETER PSSEssion Provides PSSEssions to gather the GUID from .PARAMETER ConnectionPreference Determines if the 'Get-CCMConnection' function should check for a PSSession, or a CIMSession first when a ComputerName is passed to the function. This is ultimately going to result in the function running faster. The typical use case is when you are using the pipeline. In the pipeline scenario, the 'ComputerName' parameter is what is passed along the pipeline. The 'Get-CCMConnection' function is used to find the available connections, falling back from the preference specified in this parameter, to the the alternative (eg. you specify, PSSession, it falls back to CIMSession), and then falling back to ComputerName. Keep in mind that the 'ConnectionPreference' also determines what type of connection / command the ComputerName parameter is passed to. .EXAMPLE C:\PS> Get-CCMGUID Returns the GUID from local computer .EXAMPLE C:\PS> Get-CCMGUID -ComputerName 'Workstation1234','Workstation4321' Returns the GUID from Workstation1234, and Workstation4321 .NOTES FileName: Get-CCMGUID.ps1 Author: Cody Mathis Contact: @CodyMathis123 Created: 2020-01-18 Updated: 2020-02-27 #> [CmdletBinding(DefaultParameterSetName = 'ComputerName')] param ( [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true, ParameterSetName = 'CimSession')] [Microsoft.Management.Infrastructure.CimSession[]]$CimSession, [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true, ParameterSetName = 'ComputerName')] [Alias('Connection', 'PSComputerName', 'PSConnectionName', 'IPAddress', 'ServerName', 'HostName', 'DNSHostName')] [string[]]$ComputerName = $env:ComputerName, [Parameter(Mandatory = $false, ParameterSetName = 'PSSession')] [Alias('Session')] [System.Management.Automation.Runspaces.PSSession[]]$PSSession, [Parameter(Mandatory = $false, ParameterSetName = 'ComputerName')] [ValidateSet('CimSession', 'PSSession')] [string]$ConnectionPreference ) begin { $getGUIDSplat = @{ Namespace = 'root\CCM' Query = 'SELECT ClientID, ClientIDChangeDate, PreviousClientID FROM CCM_Client' } } process { foreach ($Connection in (Get-Variable -Name $PSCmdlet.ParameterSetName -ValueOnly)) { $getConnectionInfoSplat = @{ $PSCmdlet.ParameterSetName = $Connection } switch ($PSBoundParameters.ContainsKey('ConnectionPreference')) { $true { $getConnectionInfoSplat['Prefer'] = $ConnectionPreference } } $ConnectionInfo = Get-CCMConnection @getConnectionInfoSplat $Computer = $ConnectionInfo.ComputerName $connectionSplat = $ConnectionInfo.connectionSplat $Result = [ordered]@{ } $Result['ComputerName'] = $Computer try { [ciminstance[]]$CurrentGUID = switch ($Computer -eq $env:ComputerName) { $true { Get-CimInstance @getGUIDSplat @connectionSplat } $false { Get-CCMCimInstance @getGUIDSplat @connectionSplat } } if ($CurrentGUID -is [Object] -and $CurrentGUID.Count -gt 0) { foreach ($GUID in $CurrentGUID) { $Result['GUID'] = $GUID.ClientID $Result['ClientGUIDChangeDate'] = $GUID.ClientIDChangeDate $Result['PreviousGUID'] = $GUID.PreviousClientID [PSCustomObject]$Result } } else { Write-Warning "No ClientID information found for $Computer" } } catch { $ErrorMessage = $_.Exception.Message Write-Error $ErrorMessage } } } } |