I find that on decrypting a encrypted message received using Microsoft Outlook
2002 (10.6838.6845) SP3, the decrypted message text is displayed in the From:
field area instead of in the body of the message.

Image "encrypted.png" shows the original message, and "cleartext" shows the
result of decrypting the message.

The three lines of the message

Line #1 This is the test text
Line #2 This is the test text
Line #3 This is the test text

are show displayed where the sender's address would normally be displayed.

Outlook 2002 is not supported.

You should have seen a message telling that.