Hi Kaika 313,
Please check the publication dates on the documents. The one you are referencing is from 2014 and the one Joe is referencing is from 2016. It may well be the difference is European release of the product versus North American release. Here in North America there has never been any mention of PDF/A. You will need to contact support in your local area to explore what is possible on the Italy release of the WorkCentre 4265.