I trying to share my contacts and calendar between 3 computers our office. We are using Vista and 7 with outlook 2010. I tried to share the contacts as described in this article http://office.microsoft.com/en-us/outlook-help/share-a-contacts-folder-with-others-HA010355056.aspx but for some reason the " Share Contacts" and " Share Calender" buttons are greyed out. If I select an individual contact it will allow me to share that but no matter what contact folder I select the button stays greyed out. Any Ideas what is causing this and how to fix it?