https://oauth-cpaas.att.com/cpaas/addressbook/v1/4c96516e-8f27-458d-ab97-384b4d904c69/default/contacts/checkuser2contact
{"requestError":{"serviceException":{"text":"The following service error occurred: %1. Error code is %2.","messageId":"SVC2000","variables":[" The AddressBook Entry checkuser2contact to be updated was not found.","500"]}}}
Used the test account at API marketplace as test@ask-mail.com
UpdateContact still fails at
Used the test account at API marketplace as test@ask-mail.com