just booked a revenue ticket on KLM with delta. my returned portion is in "O" class. never seen such a business fare class out of all the years with KLM. their business fare classes are J, C, D, I & Z. went to delta.com and "O" was no where to be found to earn MQMs or MQDs. DM desk could not figure this out either. anyone has dealt with this situation before? please advise. thanks.