Apache server Kerberos auth with Windows AD

Hi, I try to configure my web server apache to make authentification by Kerberos and hopefully a "Windows authentification", like if a valid domain user is connected to a Windows domain workstration, the auth will be transparent to access the website.

I try different thing to configure Kerberos, the linux machine is a member of the AD domain but the kinit seems to failed.

Does somebody did already have this kind of setup?

I'm on Redhat 7.2, with all the latest package available.
If I write the command
kinit ADuser they ask me for a password and deliver me a ticket
If i write the command
kinit HTTP/mywebserver@domainname I got an error client not found in Kerberos database while getting initial credentials

I don't know where to search
some advice will be appreciated