As Jigs says, there is “some” connection. You can copy-paste as a link. It works in both ways, the huge issue is the refresh rate. For example, I tried to use it to send and retrieve data from excel to be calculated in MS Project. It works, but when I tried to use Crystal Ball in Excel, to simulate scenarios, I had to do it “step by step”, because the changes in Excel are very fast, and the return for the results in MS Project has a “delay” that makes impossible to work with those numbers in a fast way.