The device must be able to resolve to the Exchange Web Services URL and connect to it using HTTP or HTTPS.

Note:
If HTTPS is enabled, the certificate must be trusted by the device.
  • Communicator Phone Edition tries to connects to the Exchange Server 2007 Autodiscover service in the following order:

    • https://<SMTP domain>/autodiscover/autodiscover.xml

    • https://autodiscover.<SMTP domain>/autodiscover/autodiscover.xml

    • http -> https redirect

  • On successful response, Communicator Phone Edition connects to the Exchange Web Service URL in the Autodiscover response XML.

  • The certificate from Exchange Server 2007 must be trusted.