Apple iOS/iPadOS 18 must implement the management setting: use SSL for Exchange ActiveSync.

Exchange email messages are a form of data in transit and thus are vulnerable to eavesdropping and man-in-the-middle attacks. Secure Sockets Layer (SSL), also referred to as Transport Layer Security (TLS), provides encryption and authentication services that mitigate the risk of breach. SFRID: FMT_SMF.1.1 #47