ESAM6600 DeLonghi – how to make weaker coffee? or is it the coffee beans?

Just new owner of a Prima Donna ESAM 6600 – I know price is ouch but it’s an Excellent Automatic Machine better than my old GAGGIA and it is much quicker but the coffee I make on Gaggia tastes better than DeLonghi – I don’t know whether it is the coffee beans I have been given for free or I need to adjust something on the machine, I have selected extra-mild taste but it still tastes strong. I enjoy drinking Lavazza – 100% Arabic beans. I am yet to try this one on the ESAM6600 as I have opened Free coffee beans of LaZumba which is a mix of exotic ethiopian beans. Any coffee lovers out there can help me understand coffee beans or machine better?