10.14.0, Beta 1 ; DEP enrollment fails on known good network, error is: "Failed to Contact Mobile Device Management Server" ; could possibly have something to do with network settings as direct ethernet is not being auto-detected.
DEP / Remote Management Fails, can't find MDM Server
I am having this same issue. We use Ground Control to provision and enroll our devices into Airwatch. Our fleet of iPads are connected to our guest network and are wiped and re-enrolled after the patient is discharged. The initital set up works fine but after a few uses, we get the same failure message. I've been told that this issue is related to Apple servers being down but I don't think this is correct.