Here is the problem:

As email account (my wife’s) password was hacked and a lot spam was being sent from said account.   What we did was change here password.  However, she is also the yahoo CARDDAV (carddav.address.yahoo.com) on her iPhone which synced to the same password.  After the change that account can no longer log into the CARDDAV account and has lost all that information.

HELP!