My app fails when calling Outlook.Namespace.Folders

[Ryan H]

I made a program that reads emails from an Outlook mailbox and does some
stuff and the program works fine.
However, my boss now tells me that the program is to be executed from a
remote computer. I now get the following error when calling the program
remotely:

"Could not complete the operation because the service provider does not
support it. at Outlook.NameSpaceClass.get_Folders()
For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp."
Below is the piece of code in the program where the error occurs:

' Create Outlook application
Dim loApp As Outlook.Application = New Outlook.Application

' Get Mapi NameSpace
Dim loNS As Outlook.NameSpace = loApp.GetNamespace("MAPI")

' Error occurs here
Dim loFol As Outlook._Folders = loNS.Folders
How do I fix this?

[Alvin Bruney [ASP.NET MVP]]

A couple of things to look at here:
1.
Outlook requires authentication before being called. If you don't
impersonate or create credentials, the process running your application will
be used to present credentials to Outlook. Those credentials must be able to
authenticate against outlook. In your first instance, the logged on user is
being used to authenticate outlook by default so you likely won't see any
issue.

2.
You could also be running into the Outlook object model guard.

3.
The supported technology for interacting with outlook is WebDav.

--
Regards,
Alvin Bruney

Want a free copy of VS 2008 w/ MSDN premium subscription?
Details at http://msmvps.com/blogs/alvin/Default.aspx

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"Ryan H" <rh******@smci.comwrote in message
news:#q**************@TK2MSFTNGP02.phx.gbl...

I made a program that reads emails from an Outlook mailbox and does some
stuff and the program works fine.
However, my boss now tells me that the program is to be executed from a
remote computer. I now get the following error when calling the program
remotely:

"Could not complete the operation because the service provider does not
support it. at Outlook.NameSpaceClass.get_Folders()
For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp."
Below is the piece of code in the program where the error occurs:

' Create Outlook application
Dim loApp As Outlook.Application = New Outlook.Application

' Get Mapi NameSpace
Dim loNS As Outlook.NameSpace = loApp.GetNamespace("MAPI")

' Error occurs here
Dim loFol As Outlook._Folders = loNS.Folders
How do I fix this?

[Brian Tillman [MVP - Outlook]]

"Ryan H" <rh******@smci.comwrote in message
news:%2******************@TK2MSFTNGP02.phx.gbl...

>I made a program that reads emails from an Outlook mailbox and does some
stuff and the program works fine.

Programming questions belong in microsoft.public.outlook.program_vba or
..program_addins
--
Brian Tillman [MVP-Outlook]