I have a user Jane she has a contacts that she needs to share out to people. Jane uses outlook 2k7 and is able to share with user Bob just fine. User Bob has outlook 2k7 also. When Jane addes user Cathy, who uses Outlok 2k3, Cathy gets the following error: " Unable to display the folder. The contacts folder could not be found". I have removed and readded user Cathy from Jane's shared contacts and no change. I added my network support user to Janes shared contacts and get the same error as user Cathy. I do not currently have another Outlook 2k7 client to test with.