Hi. I have the following scenario : -'example.com' domain running on premises -'aws.example.com' domain running on 'Amazon Microsoft AD' in VPC with VPN connection to on premises. - One-way trust created from aws.example.com to example.com I´m currently able to log in to a Windows server joined to aws.example.com using example.com credentials. Now i want the same for our Linux servers running in Amazon VPC and have tried using this guide.: http://docs.aws.amazon.com/directoryservice/latest/admin-guide/join_linux... I am able to login using credentials from aws.example.com like this .: ssh user(a)aws.example.com (user is present in this domain) But i am not able to do it using ssh user(a)example.com (user is present in this domain) I have searched a lot on this topic and saw freeipa mentioned a few times, but i would rather avoid having to use extra software if necessary. Any help would be greatly appreciated. Please let me know if i need to provide any more details Best regards Kasper