Sorting contents with a PS script - powershell

Question

Goal of this post:
Sort Name column with csv filter -contains "-POS-"
Only pull back the top Bitlocker key from AzureAD and place that one key into the bitlockerKeys column.
This is a script from - https://gitlab.com/Lieben/assortedFunctions/blob/master/get-bitlockerEscrowStatusForAzureADDevices.ps1
This is not my script, but I need it to work like this for a project I am doing. Did I mention that I am a complete PS noob here? Take it easy on me please lol.
function get-bitlockerEscrowStatusForAzureADDevices{
#Requires -Modules ImportExcel
<#
.SYNOPSIS
Retrieves bitlocker key upload status for all azure ad devices
.DESCRIPTION
Use this report to determine which of your devices have backed up their bitlocker key to AzureAD (and find those that haven't and are at risk of data loss!).
Report will be stored in current folder.
.EXAMPLE
get-bitlockerEscrowStatusForAzureADDevices
.PARAMETER Credential
Optional, pass a credential object to automatically sign in to Azure AD. Global Admin permissions required
.PARAMETER showBitlockerKeysInReport
Switch, is supplied, will show the actual recovery keys in the report. Be careful where you distribute the report to if you use this
.PARAMETER showAllOSTypesInReport
By default, only the Windows OS is reported on, if for some reason you like the additional information this report gives you about devices in general, you can add this switch to show all OS types
.NOTES
filename: get-bitlockerEscrowStatusForAzureADDevices.ps1
author: Jos Lieben
blog: www.lieben.nu
created: 9/4/2019
#>
[cmdletbinding()]
Param(
$Credential,
[Switch]$showBitlockerKeysInReport,
[Switch]$showAllOSTypesInReport
)
Import-Module AzureRM.Profile
if (Get-Module -Name "AzureADPreview" -ListAvailable) {
Import-Module AzureADPreview
} elseif (Get-Module -Name "AzureAD" -ListAvailable) {
Import-Module AzureAD
}
if ($Credential) {
Try {
Connect-AzureAD -Credential $Credential -ErrorAction Stop | Out-Null
} Catch {
Write-Warning "Couldn't connect to Azure AD non-interactively, trying interactively."
Connect-AzureAD -TenantId $(($Credential.UserName.Split("#"))[1]) -ErrorAction Stop | Out-Null
}
Try {
Login-AzureRmAccount -Credential $Credential -ErrorAction Stop | Out-Null
} Catch {
Write-Warning "Couldn't connect to Azure RM non-interactively, trying interactively."
Login-AzureRmAccount -TenantId $(($Credential.UserName.Split("#"))[1]) -ErrorAction Stop | Out-Null
}
} else {
Login-AzureRmAccount -ErrorAction Stop | Out-Null
}
$context = Get-AzureRmContext
$tenantId = $context.Tenant.Id
$refreshToken = #($context.TokenCache.ReadItems() | where {$_.tenantId -eq $tenantId -and $_.ExpiresOn -gt (Get-Date)})[0].RefreshToken
$body = "grant_type=refresh_token&refresh_token=$($refreshToken)&resource=74658136-14ec-4630-ad9b-26e160ff0fc6"
$apiToken = Invoke-RestMethod "https://login.windows.net/$tenantId/oauth2/token" -Method POST -Body $body -ContentType 'application/x-www-form-urlencoded'
$restHeader = #{
'Authorization' = 'Bearer ' + $apiToken.access_token
'X-Requested-With'= 'XMLHttpRequest'
'x-ms-client-request-id'= [guid]::NewGuid()
'x-ms-correlation-id' = [guid]::NewGuid()
}
Write-Verbose "Connected, retrieving devices..."
$restResult = Invoke-RestMethod -Method GET -UseBasicParsing -Uri "https://main.iam.ad.ext.azure.com/api/Devices?nextLink=&queryParams=%7B%22searchText%22%3A%22%22%7D&top=15" -Headers $restHeader
$allDevices = #()
$allDevices += $restResult.value
while($restResult.nextLink){
$restResult = Invoke-RestMethod -Method GET -UseBasicParsing -Uri "https://main.iam.ad.ext.azure.com/api/Devices?nextLink=$([System.Web.HttpUtility]::UrlEncode($restResult.nextLink))&queryParams=%7B%22searchText%22%3A%22%22%7D&top=15" -Headers $restHeader
$allDevices += $restResult.value
}
Write-Verbose "Retrieved $($allDevices.Count) devices from AzureAD, processing information..."
$csvEntries = #()
foreach($device in $allDevices){
if(!$showAllOSTypesInReport -and $device.deviceOSType -notlike "Windows*"){
Continue
}
$keysKnownToAzure = $False
$osDriveEncrypted = $False
$lastKeyUploadDate = $Null
if($device.deviceOSType -eq "Windows" -and $device.bitLockerKey.Count -gt 0){
$keysKnownToAzure = $True
$keys = $device.bitLockerKey | Sort-Object -Property creationTime -Descending
if($keys.driveType -contains "Operating system drive"){
$osDriveEncrypted = $True
}
$lastKeyUploadDate = $keys[0].creationTime
if($showBitlockerKeysInReport){
$bitlockerKeys = ""
foreach($key in $device.bitlockerKey){
$bitlockerKeys += "$($key.creationTime)|$($key.driveType)|$($key.recoveryKey)|"
}
}else{
$bitlockerKeys = "HIDDEN FROM REPORT: READ INSTRUCTIONS TO REVEAL KEYS"
}
}else{
$bitlockerKeys = "NOT UPLOADED YET OR N/A"
}
$csvEntries += [PSCustomObject]#{"Name"=$device.displayName;"bitlockerKeys"=$bitlockerKeys}
}
$csvEntries | Export-Excel -workSheetName "BitlockerKeyReport" -path "C:\BitLockerKeyReport.xlsx" -ClearSheet -TableName "BitlockerKeyReport" -AutoSize -Verbose
}
get-bitlockerEscrowStatusForAzureADDevices -showBitlockerKeysInReport