Hi,

Are we planning to do this for specific Workflow or globally to all the requests.

If it is globally for all the approval request, then will implement the Scheduled Job with date filter criteria to move the request to Cancelled. In the workflow we should have different flow for Cancelled.

If it is specific for a workflow, will use the DueDate field in Approval table, will keep updated with 7 days duration. In the workflow Branch to Approval and Timer activity. When the Due Date exceeds with current time, system move it to next stage.

Regards,
Baala T