SQL Database Move

SQL Database Move

I am very new to ADSelfService Plus ver. 4.5
as in, our team recently acquired ownership of the production environment.

our DBA team has informed us they need to move our sql instance to a new server.
what is the best practice for updating the sql configuration?

i found this KB
but was unable to locate a file    changeDBServer.bat
and the KB doesnt really specify what version it is referencing. any guidance would be greatly appreciated.
side note: is there a way to retrieve/change the admin password
                New to ADManager Plus?

                  New to ADSelfService Plus?