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Searching for AD users with missing email address

In this case, I was searching for AD users with populated proxyaddresses property, but with missing email address from specific domain. For example: a user was having following email addresses: and, but was missing the I wrote a singleliner PowerShell for listing those users:

Get-ADUser -LDAPFilter "(&(proxyAddresses=*)(!proxyAddresses=smtp:*" -Properties * | ? {$_.enabled -eq $true } | ft name,proxyaddresses -AutoSize -Wrap
Also, there was one more condition that users with missing email address have to be enabled.

I hope that this singleliner Powershell will help you in a quest for missing email addresses.

A Room or Room List disappears from Outook Scheduling Assistant

This case is really cool, and on a first look it looks like there is some magic involved. Help desk support engineer has escalated a situat...