Rebooking in Cockpit

Is Rebooking via Cockpit only possible for Published fares?

Can LH Group fares also be rebooked with the rebooking feature?

How long is the usual processing time when a rebooking is entered via the rebooking tool?

Can rebookings be made before ticketing?

Is there no limit to the number of rebookings?

I often get the message: "Unfortunately, automatic rebooking is not possible. Please send us your rebooking request using the form."

The airline has rebooked the ticket, who can make further changes later?

Where do I enter the FOP for a rebooking?

On one of my last rebookings I didn't get the differential amount refunded because the airline didn't refund it. Why is this so?