A Technician Receives a Call from Joe, a User, Who

Multiple Choice

A technician receives a call from Joe, a user, who is unable to log into any of the company's SaaS application. The applications are provided by multiple vendors. Joe reports his credentials were working previously, and he is able to log into the locally hosted applications with the same credentials. Which of the following is the MOST likely cause of Joe's issues?

A) There is an error with the federation service.
B) The user's account is locked out.
C) The user's security token has expired.
D) The user's personal certificate has expired.