We have about 50 pre existing sub sites with tasks in each site. The sub sites are derived from a standard template. After about 3 months our users wanted a workflow to send a notification when a task is assigned to some one. So our Vendor has changed the Templete to do so. Now all new sites works fine and send out a notification as expected.
My question is how to assign the workflow to pre existing sites, so the one before the template contained the workflow.