To CDO experts: Problems logging on to Exchange from IIS using a VB DLL

I am really stuck on this one, and would really appreciate some help. Here is the problem:

I am writing a VB DLL using CDO Library 1.21 (CDO.DLL) which will be used in a web application to allow users to retrieve and send emails through IIS. This web application is supposed to run through the internet, therefore the machine will not be logging on to the domain.

Everything works fine while testing when I am logged on in NT under the same user as the exchange server profile I am using. However, when supplying a different user to the session LOGON method, I get the following message on my browser after entering the correct username/password on the logon dialog:

[Collaboration Data Objects - [MAPI_E_NOT_FOUND(8004010F)]]

Please note that the other user I am trying to test with is a valid Exchange & NT username.

Here is what I have done so far:

1) Disabled anonymous log on in IIS
2) Disabled NT challenge response in IIS
3) Enabled Basic authentication (clear text) to force IIS to prompt me for a username/password.
4) Used the follwing piece of code to log on:

    Set objSession = CreateObject("Mapi.Session")
    objSession.Logon , cUserPassword, False, , , , cExchangeServerName & vbLf & cMailUserAlias

Where cUserPassword is an argument for the NT & Exchange user password and cMailUserAlias is the NT & Exchange username.

The IIS server is running on my local machine (Win2k pro)
The Exchange is running on a BDC
The NT server is running on a 3rd machine.

I am really stuck. Please help.
LVL 1
mmahdiAsked:
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eeevansConnect With a Mentor Commented:
I believe so, or it may need to be installed as an add-on.
Regards
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Anthony PerkinsCommented:
Have you tried using CDONTS instead?
Anthony
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wongchunCommented:
Are you configured MAPI Profile in Control Panel\Mail?

Please add a default profile for using MAPI.Session.

Also you can use CDONTS object to instead your DLL for sending email out.

Daniel
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mmahdiAuthor Commented:
Just to clarify a couple of point folks:

- I do not want to use CDONTS, as this web app was meant to replace outlook when users are away from the office. I am not just looking to send email.

- People should be able to access their exchange account from any PC in the world such as internet cafes, friend's PC, etc ... If this is not possible, I need to be able to allow mobile users who use their laptop at work and away from work to access their account.
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eeevansCommented:
Is there a reason you don't want to turn on the MS Outlook Web Access for Exchange Server?  It kind of takes care of this for you.
Regards
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mmahdiAuthor Commented:
eeevans,

I presume this feature can be enabled from Exchange Server administration screen, is that the case?

Thanks
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mmahdiAuthor Commented:
Thanks eeevans I will try it then.
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mmahdiAuthor Commented:
Thanks eeevans,

Altough your reply was not a solution as such, but with your help I will make it clear to the user that exchange web components need to be enabled.

Thanks again
mmahdi
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