Don this might not be the most efficient way, but it works.
Open a new email window like you are sending an email.
Type the name in the TO line, and when it auto fills the name, hit enter.
Now you should have the email address and/or the misspelled display name in
the TO line.
------ John Borwn <
[email protected]> -----------
RIGHT CLICK on the info in the TO line
On the drop down menu choose PROPERTIES
In the window that pops up, correct the display name or the email address.
Then hit OK.
That should do the trick.