I have migrated my email server from Exchange 2007 to ZCS 7. The migration was successful. All my mails migrated including Inbox,Sent Items,Deleted items ,Contacts etc. But my Calendar items and Tasks are not migrated. I got an error While migrating like
" Could not retrieve base forder URL of Exchange Server.Appointments will not be Imported. Either the permissions are configured correctly or because of Microsoft KB Article 899351. Do you want to continue ? "

I have logged as Administrator in the machine where Exchange is installed. So there wont be any permission issue and also i have checked the article and done the steps. But no use.

Can anyone help me???