Which troubleshooting step should you take to resolve the issue?

An administrator with the Super_User profile is unable to log in to FortiManager because of an authentication failure message.

Which troubleshooting step should you take to resolve the issue?
A . Make sure FortiManager Access is enabled in the administrator profile
B . Make sure Offline Mode is disabled
C . Make sure the administrator IP address is part of the trusted hosts.
D . Make sure ADOMs are enabled and the administrator has access to the Global ADOM

Answer: C

Even if a user entered the correct userid/password, the FMG denies access if a user is logging in from an untrusted source IP subnets.

Reference: https://docs.fortinet.com/document/fortimanager/6.0.3/administration-guide/107347/trusted-hosts