 <p>have you made sure that during MDM enrollment, the MDM payload (PayloadType = com.apple.mdm) you deliver has the correct Topic?</p> <p>i.e. in your APN push cert that you've downloaded from apple.you'll see something like CN = com.apple.mgmt.external.[GUID]. This needs to be the same value delivered to your IOS device during MDM enrollment.</p> <p>If APN does not give any error during the message upload, or the feedback service does not return the deviceID which indicates that the device is not available, it should mean that it will be delivered correctly to the device. The next phase is to determine if the IOS device is setup to listen to the APN message via this topic.</p> <p>You can try connecting your device to XCode or IPCU, in the console logs, it will contain logs indicating if APN was able to successfully deliver this message using the agreed upon topic.</p> <p>Here's also an article on troubleshootin APN <a href="http://developer.apple.com/library/ios/#technotes/tn2265/_index.html" rel="nofollow">http://developer.apple.com/library/ios/#technotes/tn2265/_index.html</a></p> <p>there's a downloadable profile in the above article that you can load to your device for additional verbose logging.</p>