Dear, Ive just deployed Exchange 2010 Sp1 in order to use the task functions, for local network. I already able to send/receive email and callendar. But it showed error as subjected when following theses steps : http://office.microsoft.com/en-us/outlook-help/share-task-folders-with-others-HA001229903.aspx#BM4 In Tasks, in the Navigation Pane, right-click on the task folder that you want to share. Note If you are using the Navigation Pane in Minimized view, in the Navigation Pane, click Navigation Pane, and then right-click the task folder that you want to share. Click Share folder name. In the To box, enter the name of the recipient of the sharing invitation message. Optionally, you can change the Subject. Optionally, you can grant permissions to the recipient to change your task items by selecting the Recipient can add, edit, and delete items in this tasks folder check box. In the message body, type any information that you want to include. Click Send. please help.