Exchange 2010 – Automated meeting responses not processing for external users

In Earlier versions of Exchange, If we configure the Conference Room to accept the External meeting request by enabling –processexternalmeetingmessages $true , External meeting requests will be processed and Sender would receive Meeting Accepted message.


However in Exchange 2010 , this external meeting request will not work , due to security reasons.   To resolve this, we need to do few tweaking’s on this …..

    1. Create the Contact for External Sender in GAL
    2. Create Hub Transport Rule as shown below


By this, External Meeting request will be successfully accepted by the conference room.