I am running Unity 4.0(5) with Unified messaging for WIndows Exchange 2003. So far, everything has been running ok for the past several months. But, there is an issue with some of my users who have PDAs that run Outlook Mobile 5 to check their email and voicemail in unified messaging. When they click on the .wav file to play it, it will not play; it works fine in Outlook Mobile 6, but the majority are using 5. I have found out that the codec needs to be changed in order to play the .wav files for these users. But with that being said, I wanted to know if I changed the codec in Unity (which will probably require a reload from what I have looked at) will the codec change impact anything else in a critical state (i.e. CallManager)?