I have a problem with contacts who are not visible in Exchange 2007 since we update Exchange 2003 to 2007. When we create a new account, his account is visible as a group in all groups of our organization. If i create a new group, this group is not visible in all group of our organization. I saw post on Internet which explain there is a problem with contacts list when we update to Exchange 2007. Is there a command to stop that problem? Thanks, Killian