I used the link you included in your post and was able to access the site. I was using Chrome. But, I do not have a login to test.
Here is the phone number in Italy where they may be able to assist you.
02 50989 833
Hi guys ,I am writing to ask for help.I have access to the patner xerox portal: "https://partnerportal.xerox.com/eu/Italian/" accepts username and password but then appears page not found link img http://bit.ly/2AaMXnxCan you help me, can you access it correctly?
I wrote to technical assistance but did not answer me :-(
Do you have an e-mail address to which I can write in Italy? or phone to call in Italy?