Describe how you would use PowerShell to export all emails from a specific folder.

To use PowerShell to export all emails from a specific folder in Outlook, leverage the Outlook COM object model :
# Create an Outlook application object
$outlook = New-Object -ComObject Outlook.Application

# Get the namespace and the default Inbox folder
$namespace = $outlook.GetNamespace("MAPI")
$folder = $namespace.Folders.Item("YourEmail@domain.com").Folders.Item("SpecificFolder")

# Specify the path to export the emails
$outputPath = "C:\ExportedEmails.txt"

# Open a stream to write the emails
$stream = [System.IO.StreamWriter] $outputPath

# Loop through each email in the folder and write to the file
foreach ($mail in $folder.Items) {
    $stream.WriteLine("Subject: " + $mail.Subject)
    $stream.WriteLine("Body: " + $mail.Body)
    $stream.WriteLine("Received: " + $mail.ReceivedTime)
    $stream.WriteLine("--------------------------------------------------")
}

# Close the stream
$stream.Close()?