John,
This definitely sounds like a permissions, so youâre in the right place. Permissions can be very tricky, so the best bet is always to contact support because they can log in as the user and verify whether or not a permissions change had the desired effect.
Short of that though there are a couple of things you should check. On the contacts page make sure they have the permission for âcan view all recordsâ. Some other permissions to look at would be âcan re-assignâ, âcan view (or edit) unassigned recordsâ. Try those same permissions under the Task/Appt/Note section of the Calendar tab as well as âcan assign tasksâ.
Whenever you edit permissions the user will have to log completely out then back in before they take effect, so make sure your sales manager does this when you try any changes.