You can log in and start the DC if you want to use it.
in the NE List.If Use the user name and password that was used last time is selected, the User Name and Password fields are disabled. The NE logs in to the DC tool or NE license tool using the user name and password that was used at the previous login.
Ensure that the entered user name and password are correct. Otherwise, DC will fail to log in to NEs after being started.