Last month a new ConfigMgr hotfix became available, specific for Mobile Device Management devices in Microsoft Intune. This hotfix greatly reduces the time that's required to execute a successful retire or wipe of an MDM device by using a notification to "push" these tasks. Without this hotfix, retire and wipe operations could require 24 hours to run successfully, because they relied on a "pull" mechanism of this frequency. This happens with me on installations also, where retirement could require 24 hours of even more!
After you apply this hotfix, retire and wipe operations are pushed to the following MDM device types: iOS, Android, Windows 8.1
These operations now run on the device in a matter of seconds, assuming the device is reachable by Microsoft Intune. The device must have an active data connection for Intune to communicate with it. Just great that this ConfigMgr Hotfix speeds up retire and wipe operations to seconds!
Note: If a device is not reachable by Intune when a retire or wipe operation is requested, the operation will run the next time that the device comes online and connects with the Intune service. This could require up to 24 hours.
To apply this hotfix, you must have Cumulative Update 3 for ConfigMgr 2012 R2 installed.
Download hotfix: Microsoft Support