HU not available in ODO

Hi,

When we are checking the Outbound Delivery in EWM, the HU related to the delivery is not found, (the delivery is in completed status), we want to see the HU linked to the delivery,

FYI..We will be archiving the HU's which is older than 15 days.

Will this archiving, remove the HU which is linked to the delivery? How can we find which HU was assigned to this delivery?

Can any one help.

Regards

Raj