The suggested answer is A, E.
For the PowerShell Mail integration with Microsoft Exchange service account when only iOS and Android devices are in use, the minimum requirements include the Mail Recipients role and the Organization Client Access role. The Mail Recipients role is essential for managing email recipients, and the Organization Client Access role is necessary for accessing the client connections. These two roles provide the required permissions for managing iOS and Android devices. Recipient Policies role is not needed unless managing Windows Phone 7 and BlackBerry devices, and PowerShell 2.0 is outdated and not specific to the roles required.