Most RecentMost ViewedMost LikesConfigure Toll-free Numbers for Dial-In Conferencing in Office365First published on TECHNET on Jul 11, 2016 Microsoft’s Matt Soseman has just published a post on this topic.Unable to call the UM Auto Attendant configured on UM online with O365.First published on TECHNET on Apr 16, 2016 We have encountered issues where users are unable to reach the UM auto Attendant configured in O365.