You have a windows server 2008 core server and need to join a domain
To join a domain you use the netdom command. e.g.
netdom join SRV1 /domain:mydomain.com /Userd:Administrator /passwordD:*
The "start" behind the password is right! The command will ask the password for the domain administrator. (thats why you use Userd and passwordD to show the user that this is the domain administrator and not the local one)
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.