Suspend With Workflows
When selected, the Suspend With Workflows option instructs the system to automatically suspend the document (file) when attached to an event handler that suspends. This means that no user can take any action with respect to that document until after the event handler is unsuspended.
To allow changes to attached documents while an associated event handler is suspended, clear this check box.
When this check box is selected, the attached document replaces the original document when the associated event handler finishes. When this check box is cleared, the attached document does not replace the original document.
For more information, see Working with Document (File) Attachments.