Some organisations operate a secure web service which is over and above the security defined in EToN. This will stop users sending a notice to these organisations until the recipients SSL certifcate is imported into Oracle. When a secure web service is in use, the notice URL will usually be prefixed with HTTPS:// rather than HTTP://
Download the following file which contains the nessesary instructions and files.
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http://communities.bentley.com/products/assetwise/exor/m/mediagallery/269444.aspx