We have Exchagne 2007 running, and OCS 2007 without UM, we are planning on intergrating UM soon. However one issue is still alluding me. Office Communicator 2007 is unable to retrieve calender and Out of Office information fromthe Exchagne Serer. I feel that the issue is related to public folders. We are not all Outlook 2007, the majority of clients run Outlook 2003. In order to get the Outlook 2007 clients to see Free/Busy info I had to add a registry entry which directred Outlook 2007 to look to the public folders for that information. I think Communicator 2007 is not looking to the public folder for the information. If someone could confirm my thinking that would be great, or if anyone has any ideas on why Communicator 2007 would not be able to retrieve the calender and out of office information. If anything needs clarification please ask, I really need some help on this one.