Get all Room Lists in your Exchange Organization

Just a quick PowerShell one-liner on how to find all configured room lists in your Exchange organization:

Set-ADServerSettings -ViewEntireForest $true

Get-DistributionGroup -ResultSize Unlimited | `
Where {$_.RecipientTypeDetails -eq "RoomList"} | `
Format-Table DisplayName,Identity,PrimarySmtpAddress –AutoSize 

Enjoy Exchange Server.