IMAP deleted items with strikeout markup still displayed in the Online mailbox

After deleting items from the remote GroupWise IMAP client, the same items 
still appear in the Online client with the strikeout markup displayed.

The following option has been enabled by using ConsoleOne to right click the Post Office |
GroupWise Utilities | Client Options | General




According to the documentation:

IMAP Copy Results in a GroupWise Move

By default, when you move an item from one folder to another in an IMAP email
client, the IMAP email client creates a copy of the item in the new location
and marks the original item for deletion. 
The IMAP email client might display the original item with strikeout markup, to
indicate that it will be deleted according to the cleanup schedule you have
selected, or the IMAP email client might hide such items until they are
automatically cleaned up. When this IMAP behavior synchronizes to your
GroupWise mailbox, GroupWise by default displays the original items with the
strikeout markup, and you might have been manually deleting those items from
your GroupWise mailbox. Select this option so that items with strikeout markup
no longer display in GroupWise.

Since the items with strikeout markup are still displayed in the Online client,
this option is not working according to the documentation.