function ConvertTo-XMLCertificates {
    <#
    .SYNOPSIS
    Converts a PowerShell custom object representing certificate data into XML format.

    .DESCRIPTION
    This function takes a PowerShell custom object representing certificate data and converts it into XML format for storage or transmission.

    .PARAMETER GPO
    The PowerShell custom object representing the certificate data.

    .PARAMETER Category
    An array of categories for the certificate data.

    .PARAMETER SingleObject
    Indicates whether to convert a single object or multiple objects.

    .EXAMPLE
    ConvertTo-XMLCertificates -GPO $certificateDataObject -Category @('Category1', 'Category2') -SingleObject

    Description:
    Converts the $certificateDataObject into XML format for multiple categories as a single object.

    .EXAMPLE
    $certificateDataObjects | ConvertTo-XMLCertificates -Category @('Category1') -SingleObject

    Description:
    Converts multiple certificate data objects in $certificateDataObjects into XML format for a single category.
    #>
    [cmdletBinding()]
    param(
        [PSCustomObject] $GPO,
        [string[]] $Category,
        [switch] $SingleObject
    )
    $SkipNames = ('Name', 'LocalName', 'NamespaceURI', 'Prefix', 'NodeType', 'ParentNode', 'OwnerDocument', 'IsEmpty', 'Attributes', 'HasAttributes', 'SchemaInfo', 'InnerXml', 'InnerText', 'NextSibling', 'PreviousSibling', 'ChildNodes', 'FirstChild', 'LastChild', 'HasChildNodes', 'IsReadOnly', 'OuterXml', 'BaseURI', 'PreviousText')
    if ($SingleObject) {
        $CreateGPO = [ordered]@{
            DisplayName = $GPO.DisplayName
            DomainName  = $GPO.DomainName
            GUID        = $GPO.GUID
            GpoType     = $GPO.GpoType
            Count       = 0
            Settings    = $null
        }
        [Array] $CreateGPO['Settings'] = foreach ($Setting in $GPO.DataSet) {
            $SettingName = $Setting.Name -split ":"
            $MySettings = [ordered] @{
                CreatedTime         = $GPO.CreatedTime         # : 06.06.2020 18:03:36
                ModifiedTime        = $GPO.ModifiedTime        # : 17.06.2020 16:08:10
                ReadTime            = $GPO.ReadTime            # : 13.08.2020 10:15:37
                SecurityDescriptor  = $GPO.SecurityDescriptor  # : SecurityDescriptor
                FilterDataAvailable = $GPO.FilterDataAvailable # : True
            }
            $Name = $SettingName[1]
            #$Name = Format-ToTitleCase -Text $Setting.Name -RemoveWhiteSpace -RemoveChar ',', '-', "'", '\(', '\)', ':'
            $MySettings['Name'] = $Name # $Setting.Name

            ConvertTo-XMLNested -CreateGPO $MySettings -Setting $Setting -SkipNames $SkipNames #-Name $Name

            if ($MySettings.Data) {
                $bytes = $MySettings.Data -replace '\r?\n' -split '(?<=\G.{2})' -ne '' -replace '^', '0x' -as [byte[]]
                $CertificateData = [System.Security.Cryptography.X509Certificates.X509Certificate2]::new($bytes)

                $MySettings['NotBefore'] = $CertificateData.NotBefore
                $MySettings['NotAfter'] = $CertificateData.NotAfter
                $MySettings['HasPrivateKey'] = $CertificateData.HasPrivateKey
                $MySettings['Thumbprint'] = $CertificateData.Thumbprint
                $MySettings['SerialNumber'] = $CertificateData.SerialNumber
                $MySettings['Version'] = $CertificateData.Version
                $MySettings['Handle'] = $CertificateData.Handle
                $MySettings['SignatureAlgorithm'] = $CertificateData.SignatureAlgorithm.Value
                $MySettings['SignatureAlgorithmName'] = $CertificateData.SignatureAlgorithm.FriendlyName
                $MySettings['KeyUsages'] = $CertificateData.Extensions.KeyUsages
                $MySettings.Remove('Data')
            }

            [PSCustomObject] $MySettings
        }

        $CreateGPO['Count'] = $CreateGPO['Settings'].Count
        $CreateGPO['Linked'] = $GPO.Linked
        $CreateGPO['LinksCount'] = $GPO.LinksCount
        $CreateGPO['Links'] = $GPO.Links
        [PSCustomObject] $CreateGPO
    } else {
        foreach ($Setting in $GPO.DataSet) {
            $CreateGPO = [ordered]@{
                DisplayName = $GPO.DisplayName
                DomainName  = $GPO.DomainName
                GUID        = $GPO.GUID
                GpoType     = $GPO.GpoType
            }
            $SettingName = $Setting.Name -split ":"
            $CreateGPO['CreatedTime'] = $GPO.CreatedTime         # : 06.06.2020 18:03:36
            $CreateGPO['ModifiedTime'] = $GPO.ModifiedTime        # : 17.06.2020 16:08:10
            $CreateGPO['ReadTime'] = $GPO.ReadTime            # : 13.08.2020 10:15:37
            $CreateGPO['SecurityDescriptor'] = $GPO.SecurityDescriptor  # : SecurityDescriptor
            $CreateGPO['FilterDataAvailable'] = $GPO.FilterDataAvailable # : True

            $Name = $SettingName[1]
            $CreateGPO['Name'] = $Name # $Setting.Name

            ConvertTo-XMLNested -CreateGPO $CreateGPO -Setting $Setting -SkipNames $SkipNames #-Name $Name

            if ($CreateGPO.Data) {
                $bytes = $CreateGPO.Data -replace '\r?\n' -split '(?<=\G.{2})' -ne '' -replace '^', '0x' -as [byte[]]
                $CertificateData = [System.Security.Cryptography.X509Certificates.X509Certificate2]::new($bytes)

                $CreateGPO['NotBefore'] = $CertificateData.NotBefore
                $CreateGPO['NotAfter'] = $CertificateData.NotAfter
                $CreateGPO['HasPrivateKey'] = $CertificateData.HasPrivateKey
                $CreateGPO['Thumbprint'] = $CertificateData.Thumbprint
                $CreateGPO['SerialNumber'] = $CertificateData.SerialNumber
                $CreateGPO['Version'] = $CertificateData.Version
                $CreateGPO['Handle'] = $CertificateData.Handle
                $CreateGPO['SignatureAlgorithm'] = $CertificateData.SignatureAlgorithm.Value
                $CreateGPO['SignatureAlgorithmName'] = $CertificateData.SignatureAlgorithm.FriendlyName
                $CreateGPO['KeyUsages'] = $CertificateData.Extensions.KeyUsages
                $CreateGPO.Remove('Data')
            }
            $CreateGPO['Filters'] = $Setting.Filters
            $CreateGPO['Linked'] = $GPO.Linked
            $CreateGPO['LinksCount'] = $GPO.LinksCount
            $CreateGPO['Links'] = $GPO.Links
            [PSCustomObject] $CreateGPO
        }
    }
}