Get-MessageUnreadHistoryByMessageId

function Get-MessageUnreadHistoryByMessageId ($MessageId, $TargetUserEmail=$null) {

    $Query = "rfc822msgid:$MessageId"

    if ($null -ne $TargetUserEmail) {
        $ID = Get-GGmailMessage -Query $Query -UserId me -All -TargetUserEmail $TargetUserEmail
        $Message = Get-GGmailMessage -UserId me -Id $Id.id -TargetUserEmail $TargetUserEmail
    } else {
        $ID = Get-GGmailMessage -Query $Query -UserId me -All
        $Message = Get-GGmailMessage -UserId me -Id $Id.id
    }
    $foundMessageStart = $false
    $Increment = 1000
    do {
        $StartId = $Message.HistoryId - $Increment

        if ($null -ne $TargetUserEmail) {
            $History = Get-GGmailHistory -UserId me -StartHistoryId $StartId -TargetUserEmail $TargetUserEmail
        } else {
            $History = Get-GGmailHistory -UserId me -StartHistoryId $StartId
        }
        $MessageHistory = $History | where {$_.Messages.Id -contains $id.id}

        if (($MessageHistory | where {$_.MessagesAdded -ne $null}) -eq $null) {
            $Increment = $Increment + ($Increment * 2)
            continue
        } else {
            $foundMessageStart = $true
        }

    } while ($foundMessageStart -eq $false)

    $Results = New-Object System.Collections.ArrayList

    foreach ($MH in $MessageHistory) {
        if ($Null -ne $MH.MessagesAdded) {
            $Unread = if($null -ne $MH.MessagesAdded -and `
                $null -ne $MH.MessagesAdded[0].Message.LabelIds -and `
                $MH.MessagesAdded[0].Message.LabelIds -contains "UNREAD"){"UNREAD"}else{"READ"}
            $Results.Add((new-object -TypeName psobject -Property `
                @{"History"=$MH.Id;"Action"="Message Added";"Status"=$Unread})) | Out-Null
        }

        if ($Null -ne $MH.MessagesDeleted) {
            $Unread = if($null -ne $MH.MessagesDeleted -and `
                $null -ne $MH.MessagesDeleted[0].Message.LabelIds -and `
                $MH.MessagesDeleted[0].Message.LabelIds -contains "UNREAD"){"UNREAD"}else{"READ"}
            $Results.Add((new-object -TypeName psobject -Property `
                @{"History"=$MH.Id;"Action"="Message Removed";"Status"=$Unread})) | Out-Null
        }

        if ($Null -ne $MH.LabelsAdded) {
            $Unread = if($null -ne $MH.LabelsAdded -and `
                $null -ne $MH.LabelsAdded[0].Message.LabelIds -and `
                $MH.LabelsAdded[0].Message.LabelIds -contains "UNREAD"){"UNREAD"}else{"READ"}
            $Results.Add((new-object -TypeName psobject -Property `
                @{"History"=$MH.Id;"Action"="Labels Added";"Status"=$Unread})) | Out-Null
        }

        if ($Null -ne $MH.LabelsRemoved) {
            $Unread = if($null -ne $MH.LabelsRemoved -and `
                $null -ne $MH.LabelsRemoved[0].Message.LabelIds -and `
                $MH.LabelsRemoved[0].Message.LabelIds -contains "UNREAD"){"UNREAD"}else{"READ"}
            $Results.Add((new-object -TypeName psobject -Property `
                @{"History"=$MH.Id;"Action"="Labels Removed";"Status"=$Unread})) | Out-Null
        }
    }

    return $Results
}

#Get-MessageUnreadHistoryByMessageId -MessageId CAD3t3Ryd71hXYfA@mail.gmail.com -TargetUserEmail username