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Once in a while I need to do some Windows management. This time I needed to extract a list of all mail addresses in specific active directory containers. Both the "Primary address" and "Alternate addresses" will be fetched and placed in C:\<country>.txt:

<code>
$countrylist = "DK","NO","SE"
$oulist = "user","ExchangeAccounts"

Write-Output "------------------------"
Write-Output "Fetching mail addresses."
Write-Output "------------------------"

foreach ($country in $countrylist) {
	Write-Output "Clearing file C:\$country.txt"
	If (Test-Path C:\$country.txt){
		Clear-Content C:\$country.txt
	}

	foreach ($ou in $oulist) {
		Write-Output "Getting data for $ou in $country and appending it to C:\$country.txt"

		$mailaddr = Get-Mailbox -OrganizationalUnit "ou=$ou,ou=$country,dc=AD,dc=EXAMPLE,dc=COM" -ResultSize Unlimited |Select-Object PrimarySmtpAddress, @{Name="EmailAddresses";Expression={$_.EmailAddresses |Where-Object {$_.PrefixString -ceq "smtp"}}}
		$mailaddr | ForEach-Object {$_.PrimarySmtpAddress} | Add-Content C:\$country.txt
		$mailaddr | ForEach-Object {$_.EmailAddresses -replace("smtp:", "")} | Add-Content C:\$country.txt
	}
}
</code>