Find Primary Address in use within Exchange

By | December 17, 2013

Today’s post is another short one.  It’s a Powershell one-liner to find all the Primary SMTP address suffixes in use by the mailboxes in your Exchange Org.

In this example I know that my default suffix is “”, but I want to find out what others are being used as primary:

get-mailbox -ResultSize unlimited | ? {$_.primarySMTPaddress -notmatch "" } `
| select @{l="SMTPSuffix";expression={$_.primarysmtpaddress.tostring().Split("@")[1]}} –unique

The output (which will take a while as there is a lot of post-processing in the pipeline) looks like this:




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