Below are a set of instructions which will resolve the issue
with Apple ID prompting each time an App is deployed.
Open iTunes and sign in with the same Apple ID and password
used on your iPads. This is important because using the same Apple ID and
password to which is used on the iPads is what causes the Apple ID prompt NOT
to display when deploying Apps.
Once signed in, search for the free App you wish to roll out
to your iPads. The search field is located in the top right hand corner.
Once iTunes has searched it's library you will see a list of
related iPhone Apps, iPad Apps and songs.
Select the App you wish to download under the “iPad Apps”
section.
Once downloaded iTunes will store the download file in the
following location:
Music>iTunes>iTunes Media>Mobile
applications.
Now the App/Apps have been downloaded, you then need to
login to your MDM page, Select the group level to where you want to upload your
App.
Once the correct the group level has been selected, click on
the Apps button.
Towards the right hand of the screen you will see the option
“Upload App” Click this option.
You will now need to browse to the App you wish to upload onto
the iPads. Browse to the Mobile Applications folder (Location is shown towards
the beginning of this guide). Select the App and click the Upload App button.
Once the upload App button has been clicked the uploading process will take
place, please be patient because the time the upload process can take all
depends on the size of the App and your upload speed.
Once uploaded, the App will be listed and deployed onto your iPads.