Missing Additional Response info

Hi,

We are now moving from Exchange 2007 to 2013.
On room mailbox I do not get the “additional response” message to work. On 2007 it was ok. I have tested on Outlook 2010 and 2013. Everything else seems to work, but the accept/decline e-mail from the resource have no “additional” text.

I believe the settings for the resource is ok.
Get-CalendarProcessing….
AutomateProcessing         : AutoAccept
AddAdditionalResponse      : True
AdditionalResponse        : some text

Is there any server settings, policy.. that have to be tuned for this?

Thanks
Jens-Erik