Field Service is interfaced one-to-one with CRM, and that boosts its efficiency. The package is an absolute must for any company that does service work or has a field sales team, or both. Field Service’s big strength is that it fully integrates with Microsoft Dynamics 365 – in fact, it becomes a component of that package. If you are already using CRM, then this is your logical next step. Generally, implementations are time-intensive, which makes them costly, but building on an existing CRM makes the implementation costs resoundingly lower.