Sha(ilaja)rePoint

Workflows are designed under the security concept that they run as System Account in the Windows SharePoint Services and the App Pool Identity on the server computer and domain. In Windows SharePoint Services the workflows always have administrator privileges, whatever privileges the App Pool has. This makes it possible for the workflows to perform actions [...]

Set the tag in the metadata section to true in the workflow.xml file to associate a workflow for a document library with the Document Content Type. This will enable the workflow to be associated by default with all the document libraries of document content type.