Today, I needed to export a list of all of our contacts’ email addresses. The easiest way to do this was with PowerShell from the Exchange Management Shell:

Get-MailContact | Select-Object -Property PrimarySmtpAddress | Out-File c:tempcontacts.txt

Some more reading:

• TechNet: Get-MailContact (Exchange 2010)
• TechNet: Get-MailContact (Exchange 2013)
• TechNet: Out-File (PowerShell 4.0)
• TechNet: Select-Object (PowerShell 4.0)