Unfortunately I don\'t have a whole lot of information on this.
I have a customer who has moved their site from an ancient system to IIS7 on Windows 2008 Server. Info about
The suggestion is correct. If the path to the solution is not immediately obvious for whatever configuration reasons, try running procmon (filter on "online_data.xls") and see who's failing, why, and what user account they run under. Then check the ACLs.