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About Adding Overlay Managers to the Sales Team (End User)

This option guarantees that overlay sales managers can see their subordinates' opportunities, but it also means that a large number of people can end up on the sales team, a large number of opportunities can be synchronized, and that you may have to do a lot of territory administration work when reporting relationship changes

Mobile sales organizations sometimes want to consider the impact on synchronization times. You can end up providing the overlay sales managers with more information than they really want on a mobile client.