I am under the impression the ability to remove an activation lock is based on iOS version. I am having no luck with iOS 10.3+. I was told Apple changed the method Activation locks talk to the Apple secure server I opened a support case April 10th, 2018 and it was escalated to development. I have no idea how long this will take to modify. I setup a spare DEP enrolled iPad Air 2 with iOS 11.3 today and I cannot unlock the Activation with Meraki EMM today June 22, 2018.
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