Unfortunately, there is no information about the Xentry Portal Pro. I've used various search engines to locate the main website, but the procedure shown 0 results which means that the software is used privately and it's available only for certain customers or discontinued without any possibility to obtain any details regarding your inquiry.
However, after extensive search, I did manage to obtain partial information regarding this product and it appears it's hosted by Mercedes.
You need to log in on the Portal to be able to access support and additional information: https://xentryportal.i.daimler.com/wps/portal