Exchange server VS MDaemon

Hi gals/Guys

We are currently ussing MDaemon as the Email server and after few days its registration

will be expired. So as I was planning rather than shifting to a newer version why not

move to Exchange server. Although i have very little experience about exchange server also

that was just in a test enviornment. I would be greatful if you guys/gals can answer below

quesitons: -

=> What are the benefits of having Exchange server over MDaemon or vice versa.

=> What are the pros and cons of having an exchange server.

=> How difficult is to configure Exchange as compared to MDaemon keeping in mind that I

have little experience about it.

I know i can google and even goto msexchange.org for information but i need help from you

guys/gals. As this would be help from people who actullay have experience of implementing

and managing this software.

We have around 150 email addresses at the moment and will be double within 3-4 months

due to expansion program. All using Microsoft Outlook 2003/XP/2000 even there are few

using Outlook express duno why they can't use MS outlook.

Exchange has groupware and calendar functionality (in combination with Outlook)..