Symptoms
When you create a new resource mailbox by using Exchange Administrative Center, the new mailbox will not have the Automatically update email addresses based on the email address policy applied to this recipient option selected. The primary SMTP address of the new resource mailbox will be set to the UPN specified in the wizard.
Cause
This issue occurs because the Exchange Administrative Center calls the Windows PowerShell cmdlet new-mailbox and specifies the PrimarySMTPAddress parameter. When the new-mailbox cmdlet is passed the PrimarySMTPAddress parameter, the Automatically update email addresses based on the email address policy applied to this recipient option is not selected. This is to prevent the Email Address Policy from changing the primary SMTP address that was specified in the command.
Resolution
This issue has been resolved in Microsoft Exchange Server 2013 Service Pack 1. After you install this update, the Automatically update email addresses based on the email address policy applied to this recipient option will be selected when creating resource room mailboxes using Exchange Administrative Center.
More Information
The Automatically update email addresses based on the email address policy applied to this recipient option can be manually selected on the resource mailbox once the room is created. It will then be updated by the Email Address Policy. 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 confmbx@contoso.com -Alias confmbx -Name ConfRoomMailbox -Database "Mailbox Database 1" -OrganizationalUnit Users -Room -ResetPasswordOnNextLogon $true
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
