Free&Busy via HTTPS
is it possible with OX HE to use Free&Busy within Outlook via https?
yes this is possible, but sadly not very comfortable when using self-signed or expired ssl certificates. The root of all evil in this case is the certificate storage of Outlook, it checks if the server certificate exists in the Internet Explorers cert storage and denies accesses to servers which are not.
To solve this, either get a valid certificate for the server or add the custom "certificate" to the Internet Explorers certificate storage.
Hope that Helps.