Any listeners from the Microsoft DNS team here? Had an issue that started last week around 0304 CST 11/7/2024, mail deliverability for our Exchange service went to zero. Digging <rimshot> deeper it looks like the DNSSEC chain is failing, because an invalid RCODE is being returned. Forcing +noedns on our recursive boxes restores service, but would prefer not to leave this in place. Doesn't seem much like the Exchange team understands what's happening, they might need a nudge.
https://dnsviz.net/d/mail.protection.outlook.com/dnssec/ Hit me up if you want the case number or other details. Thanks for your time, Chad D
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