We are implementing (MRM) a 3rd party Outlook Calendar replacement addin and would like to disable, hide or eliminate the Add rooms button under the Scheduling assistant. I have found the article on disabling items in Office based on Group Policy, but cannot identify the Control/Command ID for the Add Rooms button. The Room button also exists under " appointment" and we would like to disable or hide it as well. We know we can hide the conference rooms at that point, but we are concerned that will generate calls (" what happened to all the conference rooms?" ). Any help with identifying the Command or Control ID for these would be appreciated.