Administrators can use PowerShell to create the resource room mailbox, and can leave out the PrimarySMTPAddress parameter. This will allow the resource room to have the Automatically update email addresses based on the email address policy applied to this recipient option selected automatically.
For example, an administrator can run the cmdlet as follows:
New-Mailbox -UserPrincipalName email@example.com -Alias confmbx -Name ConfRoomMailbox -Database "Mailbox Database 1" -OrganizationalUnit Users -Room -ResetPasswordOnNextLogon $true
Article ID: 2927121 - Last Review: 26 Mar 2014 - Revision: 1