Allow Attachment Download for Task Instances
This option specifies whether to download attachments in a task instance.
-Dtask.comment.attachment.forcedownload=true|false
By default, -Dtask.comment.attachment.forcedownload is set to false. When you click an attachment on the Comments tab of the Task Details page, the attachment is either opened or downloaded, based on your browser settings.
If you set -Dtask.comment.attachment.forcedownload to true, attachments are downloaded regardless of your browser settings.