Join a Computer to a Domain
Applies To: Windows Server 2012
For Active Directory Federation Services (AD FS) to function, each computer that functions as a federation server must be joined to a domain. federation server proxies may be joined to a domain, but this is not a requirement.
You do not have to join a Web server to a domain if the Web server is hosting claims-aware applications only.
Membership in Administrators, or equivalent, on the local computer is the minimum required to complete this procedure. Review details about using the appropriate accounts and group memberships at Local and Domain Default Groups (https://go.microsoft.com/fwlink/?LinkId=83477).
To join a computer to a domain
On the Start screen, type Control Panel, and then press ENTER.
Navigate to System and Security, and then click System.
Under Computer name, domain, and workgroup settings, click Change settings.
On the Computer Name tab, click Change.
Under Member of, click Domain, type the name of the domain that this computer will join, and then click OK.
Click OK, and then restart the computer.