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Manual Approval 
If confirmation data of a purchase order received the approval status Manual Approval Required during the automatic approval process, you, as customer, must check this confirmation data on the purchase order collaboration Web UI on the Purchase Order Details screen, and either accept or reject it manually. If you reject the data, SAP Supply Network Collaboration (SAP SNC) generates an alert. The supplier has to change the confirmation data. Various functions are available on the Web UI for the manual approval process.
In order for you to edit the purchase order, it must not have the change distribution status Published by Supplier (see Purchase Order Collaboration with Approval Process).
● Accept or reject all confirmation schedule lines and component requirements of an item
On the Items tab page, select the item and choose Accept or Reject. All confirmation schedule lines and component requirements of the item receive the corresponding status.
● Accept or reject a confirmation schedule line and its component requirements
On the Schedule Lines tab page, select the confirmation schedule line and choose Accept or Reject.
● Accept or reject all confirmation schedule lines and their component requirements at schedule line level
On the Schedule Lines tab page, choose the function Accept All or Reject All. All confirmation schedule lines on the tab page and all component requirements of these confirmation schedule lines receive the corresponding status.
● Accept or reject a component requirement
On the Components tab page, select the component requirement and choose Accept or Reject.
● Accept or reject all component requirements at component level
On the Components tab page, choose the function Accept All or Reject All.
If you want to save the purchase order with the current approval statuses but do not want to send it to the customer back-end system yet, choose Save. If you have rejected a confirmation schedule line or a confirmed component requirement, SAP SNC generates an alert.
If you have accepted all the confirmation data for a purchase order item, you can use the Update Request function to copy the confirmation data for the purchase order item as request data to the purchase order item.
To send a purchase order with updated request data to the customer back-end system, publish the purchase order. SAP SNC sends the updated purchase order to the customer back-end system. The customer back-end system updates the purchase order and sends the purchase order back to SAP SNC. You can then edit the purchase order again (see Purchase Order Collaboration with Approval Process).