WebDAV problem

Hello,

Im trying to connect to our exchange using WebDAV in visual basic. I have a question about the URI i have to use for the exchange server.

If my URI starts with “https://domain/public/….”
i get this error that i can’t establish a trust connection with the SSL channel.

AND

If my URI starts with “http://domain/public/….”
i get this error that i am not allowed (403).

Does anyone know which URI i have to use, and how i can solve the errors ?

Kind regards,