Most suitable API for Exchange 2003

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C#

C#4.0

WF

Hello everyone,

Legacy systems already in place dictate we are going to have to communicate with Exchange 2003 in our application. I have already used WebDAV + C# 2.0 in conjunction with Exchange 2003 in years previous.

Having found it a complete pain in the backside to use WebDAV in this way my question is: given that we're using C# 4.0 and WF4, what is the most suitable API for talking to Exchange 2003?

We're going to be mainly creating, editing and deleting mailboxes, distribution lists and contacts.

I've had a look at the exhaustive list here:

http://msdn.microsoft.com/en-us/library/ms876253

and can already deduce that we're not going to use WebForms. I'd like to avoid WebDAV if possible. any suggestions with links to a few examples I can evaluate and compare will be greatly appreciated.