On my Windows Home Server, I have installed SqueezeCenter. This allows our SqueezeBox to play out music, and we don't need to leave a separate computer on. I noticed that aac files were not playing, but the SqueezeBox was just skipping over them.
When I looked at the configuration of SqueezeCenter aac files are transcoded with mov123. This program is essentially just a wrapper for QuickTime. The problem is that Windows Home Server doesn't come with QuickTime installed.
I didint want to install QuickTime, as this install brings of other stuff that I didn't want. (i.e. Apple's Software Update) I found this thread that describes mplayer and faad as alternatives to mov123.
After spending several hours to get either mplayer or faad to work, I decided to just install QuickTime. I had to search on Apple's support site for a link to a version of QuickTime that would install on the home server. (The latest version of QuickTime requires XP or Vista, and the home server is running a deritive of Windows Server 2003