How to know ip address of the hadoop sandbox?

I installed VirtualBox and the sandbox on Server A (physical). The sandbox runs fine. Now I need to connect in Excel 2013 on Server B (physical) to the sandbox. Server A and B are in the same domain (both windows). So how do I know the ip address of the sandbox? I guess it’s not the ip of server A?. What I am doing is following this tutorial: http://hortonworks.com/hadoop-tutorial/partner-tutorial-microsoft/
I am at the step to connect to the hdfs from excel 2013.