There has been variations of this feature request submitted over the past few years and partial implementations to the JSS. The ability to manage the lock & home screen wallpapers for institutional shared devices is a huge benefit for admins especially those that oversee a large inventory of iPads. We now have the ability in 9.81 to set and prevent changes to the wallpaper. However one small item has been over looked and seems to never make it to reality. It would be a huge benefit for the Lock screen to have customized text capabilities such as the Device Name, Serial Number, etc.... In Apple Configurator versions 1.x and now 2.x this is available provided you prepare the devices through AC. In AC2 customized text uses Tokens such as Device Name, Serial Number, Type etc.. those Tokens are replaced by the devices unique variables and the shows on the lock screen such as the devices set Name. In my testing of AC2 with MDM auto enrollment through DEP I cannot use the wallpaper function at all when devices are prepared in that way. Setting the wallpaper can then only be done from the JSS for a single device or to a group of devices by a action>send remote commands function but its missing the feature of customized text. Please add this function.
As of the Casper Suite version 9.9, a Mobile Device Configuration Profile Payload for the Lock Screen Message was implemented. Supervised iOS 9.3 and later devices can be customized using this payload. Payload Variables can be used in the Message and Asset Tag fields control the Lock Screen Message in a more automated fashion.