We do mail archiving and stubbing on a 8.0.2 post office. We open the mailbox with an 8.0.2 client.

Encrypted messages can be archived and stubbed. When opened these messages are not displayed properly.
The client correctly displays the header with "from", "to", "date", and "subject". The mail body is empty. On the footer 2 message icons (with open envelope) are shown. One message icon has a "view attachment" command which does nothing. The other has an "open" command which does nothing too.

On the archive server side a call to "ReadItem" is made. No "ReadAttachment" call is made after this, although I would expect this because the message has two "attachments" ("smime.p7m" and "Mime.822").