Using Outlook 2003 as a Windows RMS Client

Using IE to Read RMS Mail
The RMA is available as a free download from http://www.microsoft.com/windows/ie/downloads/addon/default.asp. Before installing this add-on, you must first install the RM client, which you can download from http://www.microsoft.com/downloads/details.aspx?familyid=3115a374-116d-4a6f-beb2-d6eb6fa66eec&displaylang=en.

If you send a restricted message to someone who doesn't have Office Professional 2003, that user receives a message with a file attachment named message.rpmsg and text and HTML message parts that specify the URL for downloading the RMA. Installing the RMA adds a new file association to Windows so that files with the extension .rpmsg open through the rmarouter.exe application. The first time the user tries to open an .rpmsg file, the RMA runs a setup wizard that configures IE to use a corporate or .NET Passport account to work with RMS-protected documents. After the RMS server verifies the user's credentials, the message .rpmsg file opens in IE. The IE user will be subject to the same restrictions as an Outlook user. . . .