g,tif,doc,docx,xls,xlsx,pdf</td></tr></tbody></table><h2>AttachmentsDirectory</h2><p>This instructs attachment factory to upload attachments to the specified directory. You must <strong>ensure that the the directory is writable</strong> by IIS user or IIS Application Pool identity or whatever user account that your site is running under.</p><h2>UploadHandlerUrl</h2><p>The attachment factory Javascript Ajax library will upload attachments to this url. Make sure that you create handler a mapping in <a href=we