FotiGate SSO user concurrent session

I  have a fortigate cluster in My office. Users are authenticated using fortigate collector/DC agent installed on our domain controller. my some of  admins required access to multiple computers from their logins for troubleshooting purposes.

I tried to use following commands. but those command are work with local user group.

config user group edit --group-Name-- set auth-concurrent-override enable set auth-concurrent-value --number_of_max_concurrent_users-- next end

Is there a way to increase concurrent logging session without connecting to FortiAuthenticator?