The issue with the clock drift has been addressed and time is displaying correctly on new messages. No mail was lost or delayed during this issue but some messages got a timestamp of up to 5 minutes in the future.
Update 01/29/2020 16:45 PM 8 hrs
We've been addressing an issue with clock drift on one of our Exchange 2016 nodes. The drift is less than 5 minutes and should be resolved momentarily.