When attempting to connect with SecureClient Mobile the following error message is received. The certificate provided is invalid. Please provide the username and password.

What is the probable cause of the error?

A.
The certificate provided is invalid.

B.
The user’s credentials are invalid.

C.
The user attempting to connect is not configured to have an office mode IP address so the connection failed.

D.
There is no connection to the server, and the client disconnected.