Microsoft Teams and Dynamics combined represent an amazing platform for collaborative selling, however for any customer who needs controlled access to Dynamics opportunities (i.e. any customer in a regulated industry, selling to competing customers, using confidential information or just needing to control the visibility of sellers) must currently rely on manually managing the access to teams in Microsoft Teams which relate to their Dynamics customer or opportunity records. I don't see that being acceptable to any customer. It's a difficult problem to solve but I suspect would reap great rewards in terms of adoption of the combined platform of Teams and Dynamics.