MSI on Account and Opportunity Objects
We are currently using MSI only on lead and contact objects in SFDC, but according to documentation it seems to be possible to add it to Account and Opportunity as well. MSI was installed in our SFDC about 5 years ago, and no changes to how it works were introduced ever since, perhaps at that time MSI wasn't available on Opp and Account objects, or the company didn't find it necessary to add it to those objects. However, now I would really like to use MSI to it's full potential, so I wonder how does MSI work on Account and Opp exactly? does it show activity of all the contacts in an account and an opp? and what about stars and flames would they still appear in MSI on those objects? Moreover, to add MSI to an object layout according to documentation one has to add the following fields below to the MSI layout, but we have those fields only on lead and contact objects, so how would I add them to Opp and Account(I actually tried to add MSI to account layout on our sandbox to see how it would work and that's where I got stuck)?
Engagement
Relative Score Value
Urgency Value
Last Interesting Moment Date
Last Interesting Moment Desc
Last Interesting Moment Source
Last Interesting Moment Type