You may need these to configure your 3rd party antispam software/appliance. There were lots of articles on the internet with complicated solutions, which did not work for me. Here a Powershell one-liner for Exchange management shell: Get-Mailbox | foreach { $_.EmailAddresses | foreach { $_.SmtpAddress } }Within regular Powershell, add this line at the very start: Add-PSSnapin Microsoft.Exchange.Management.PowerShell.AdminIf you plan to run it as a batch job, the whole script could look like the following: Add-PSSnapin Microsoft.Exchange.Management.PowerShell.AdminGet-Mailbox | foreach { $_.EmailAddresses | foreach { $_.SmtpAddress } } > emails.txt |
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