Exchange 2010 Unable to book meeting rooms in trusted forest Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Messaging Software › Exchange 2007 / 2010 / 2013 › Exchange 2010 Unable to book meeting rooms in trusted forest This topic has 2 replies, 3 voices, and was last updated 6 years ago by userfull. Viewing 1 post (of 1 total) Author Posts FookseyMember Oct 09, 2014 at 9:36 am #164374 Hello there, My organisation has 2 forests that have a two-way external trust between them. An exchange federated trust has also been setup between the two businesses. We use GalSync to sync contacts and our GAL. In most cases operations within Exchange/outlook seem to work well. Users in forest 1 can view Free/busy information from forest 2 and vice-versa. When a user from one forest tries to book a meeting room in the other forest the meeting room stays as tentative and they do not receive confirmation email. I have the rooms set to AutoAccept replies: Set-CalendarProcessing ” Room 1″ -AutomateProcessing AutoAccept Questions: 1) Is this caused by having an ‘External’ domain forest trust? Would this be resolved by making the trust an Internal one? 2) Is there a way this can work without changing the domain trusts? As this might take a while for the other business to put in place. Please help? Kind Regards Fooksey Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.