Which of the following is the MOST likely cause of this issue?

A company is implementing a launchpad within an existing application that will point to an existing SaaS provider. One of the requirements is the user should not have to log on multiple times. SSO is in place. When the launchpad is used, the user is redirected to SaaS providers as designed, but is asked for login credentials.

Which of the following is the MOST likely cause of this issue?
A . Users do not exist within the SaaS provider.
B . Group permissions are incorrect.
C . Users do not exist in directory services.
D . The federation is failing.

Answer: D