By default my exchange management shell is at the [PS] prompt. How do I change it to the [MSH] prompt

I believe MSH is from the days when it wasn't called powershell, but was called Monad, a.k.a. Microsoft Shell, a.k.a. MSH. There's no missing functionality by having one prompt vs another... Is there a problem you are trying to solve?

the MSH prompt is from the beta version of powershell. PS is from the RTM version of powershell.I would upgrade the system with MSH prompt to the RTM version of powershell. This will solve your prompt problem and probably solve a couple of bugs that might be in the beta.you can also change the prompt if you really need to its a ton of examples out there and here is just a few.http://www.johndcook.com/blog/2008/05/12/customizing-the-powershell-command-prompt/http://mcpmag.com/articles/2007/07/25/powershell-title-prompts.aspxlasse at humandata dot se, http://anewmessagehasarrived.blogspot.com