Related article: How to burn protected iTunes rentals movie and TV shows to DVD?
This guide is going to show you how to remove DRM protection from iTunes music, convert DRM protected iTunes M4P to MP3, M4A to MP3, AAC to MP3 and transfer iTunes music to Zune HD. First, let's take a look at the video/audio formats Zune HD accepts:
Video Support:
WMV
MPEG-4 (MP4/M4V) (.mp4) Part 2 video
H.264 video
DVR-MS
Audio Support:
Windows Media® Audio Standard (WMA) (.wma) WMA Lossless
Advanced Audio Coding (AAC) (.mp4, .m4a, .m4b, .mov): .m4a and .m4b files without FairPlay
DRM
MP3 (.mp3)
So, if you want to play DRM protected iTunes M4P, M4A, AAC music on your Zune HD, you just need to use some software to convert the iTunes music to MP3 format and then transfer the output MP3 to your Zune HD.

Now let's take a look at how it performs to convert the iTunes music to MP3 format for Zune HD using DRM Removal: