2.1 Transport

The protocol MUST use HTTPS secure requests using version 1.1 of HTTP, as specified in [RFC2616] and [RFC2818]. All requests MUST use the POST method. POST supports uploading a request block and returning a response block.

The Autodiscover response, as specified in [MS-OXDSCLI], contains a URI that the client will use to access the two endpoints used by this protocol: the mailbox server endpoint (same as that used for the EMSMDB interface) and the address book server endpoint (same as that used for the NSPI interface).