When I installed the SQL Server 2008R2 on the windows server, the computer was not in a domain.
After I installed it, now someone moved the server into a domain.
Problem is: the server can not be accessed anymore, since it is set to windows authentication, the former accounts do not exist anymore, sa is disabled (not set).
Is there any way to change which windows accounts have admin rights to the SQL Server somehow, or do I need to reinstall it?