Organizing and accessing contact information in Outlook.com
It's quite frankly dreadful, if not atypicalof the mess that is "Outlook" webmail.
The only "solution" I've found is to Delete the Contact COMPLETELY, and start from scratch with the updated contact info.
Even that can be complex, and sometimes the "old" info appears, but it generally allows you to move on.
And yes, MICROSOFT sucks.
Sadly, so do all the other options!
Carrier pigeon, anyone?