I have a litle problem in OTM. My phone system is a opt61 with a CallPilot and my DN mailbox is 1500. When I want to enter MWK 1500 in OTM I always have the same mesage: Error: Message center DN failed validation
MAT0054) DN must be a messageCentre DN. I don't know why. But if I go in ld 11 I can configure my MWK.