What drives activity visibility in MS CRM?

I've been doing a deep dive into the effects of the security model. I recently noticed that the UI does not support sharing of activities to users or teams. This came as an unfortunate surprise because I was planning on "sharing" to be my way out of a tricky situation concerning visibility of activities between business units. Imagine a scenario with three business units: Executive, Finance, and Staff where Executive is the parent business unit to both Finance and Staff. The security roles in use all allow organizational read for accounts and contacts but only deep read access for activities. … Continue reading What drives activity visibility in MS CRM?