Exchange 2019:- Create a Room mailbox using the Exchange Management Shell

Quick Tip:

If you want to create a room mailbox, you can do so with a simple command:

• New-Mailbox -Name MyRoom -DisplayName “My Room” -Room

To Validate your setup, you can run the following command:

• Get-Mailbox myroom | fl Name,RecipientTypeDetails

There you have it, simple enough.

Hope it helps.