Sometimes we don't know the sa password when needed to create databases in Server Admin. Automation Engine Server Admin only works with SQL users with administrative privileges.
A workaround is to create a new SQL user with administrative privileges.
Procedure
Open the SQL Management Studio and login with Windows Authentication with a user who has administrative privileges.
Go to Security > Logins and right-click New Login. This opens the Login - New window.
In the Select a page section, select the General page.
In the right pane, type the Login name: (here, sa2).
Select the SQL Server authentication option and type the password.
Uncheck the Enforce password policy check-box. Click the OK button.
Select the Server Roles page in the left pane.
In the right pane, select the sysadmin check-box and click the OK button.
Test the new user by logging in with the new user name and password with SQL authentication.