In a corporate environment, a company has implemented a mobile device management (MDM) solution to secure its employees\' smartphones and tablets. The IT department is tasked with ensuring that all devices comply with the company\'s security policies, which include encryption of data at rest, enforcing strong password policies, and remote wipe capabilities. During a security audit, it was discovered that a significant number of devices were not encrypted, leading to potential data breaches. What is the most effective strategy the IT department should adopt to enhance mobile device security and ensure compliance with the encryption policy?