tests/Test-CmInvMaxMIFSize.ps1

function Test-CmInvMaxMIFSize {
    [CmdletBinding()]
    param (
        [parameter()][string] $TestName = "Max MIF File Size",
        [parameter()][string] $TestGroup = "configuration",
        [parameter()][string] $TestCategory = "CM",
        [parameter()][string] $Description = "Validate inventory loader maximum MIF file size setting",
        [parameter()][hashtable] $ScriptParams
    )
    try {
        $startTime = (Get-Date)
        [int]$MaxMIF = Get-CmHealthDefaultValue -KeySet "configmgr:MaxMIFSizeRegistryValue" -DataSet $CmHealthConfig
        [System.Collections.Generic.List[PSObject]]$tempdata = @() # for detailed test output to return if needed
        $stat   = "PASS" # do not change this
        $except = "WARNING"
        $msg    = "No issues found" # do not change this either
        $res = (Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\SMS\COMPONENTS\SMS_INVENTORY_DATA_LOADER" -Name "Max MIF Size" | Select-Object -ExpandProperty "Max MIF Size")
        if ($res -lt $MaxMIF) {
            if ($ScriptParams.Remediate -eq $True) {
                Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\SMS\COMPONENTS\SMS_INVENTORY_DATA_LOADER" -Name 'Max MIF Size' -Value $MaxMIF -Force | Out-Null
                $stat = "REMEDIATED"
                $msg  = "Max MIF Size is now set to $MaxMIF"
            } else {
                $stat = $except
                $msg  = "Max MIF size is $res (hex) which should be 3200000 (hex) or $MaxMIF"
                $tempdata.Add(
                    [pscustomobject]@{
                        CurrentMax  = "$res (hex)"
                        Recommended = "3200000 ($MaxMIF hex)"
                    }
                )
            }
        }
    }
    catch {
        $stat = 'ERROR'
        $msg = $_.Exception.Message -join ';'
    }
    finally {
        $([pscustomobject]@{
            TestName    = $TestName
            TestGroup   = $TestGroup
            Category    = $TestCategory
            TestData    = $tempdata
            Description = $Description
            Status      = $stat
            Message     = $msg
            RunTime     = $(Get-RunTime -BaseTime $startTime)
            Credential  = $(if($ScriptParams.Credential){$($ScriptParams.Credential).UserName} else { $env:USERNAME })
        })
    }
}