Here’s why my work email isn’t syncing to my phone? …

Microsoft today began disabling Exchange Web Services (EWS) by default in Exchange Online, which will cut off the protocol that Apple’s Mail and Calendar apps on Mac still rely on to sync Microsoft 365 work accounts. The cutoff has been on the cards for a fairly long time, as Microsoft stopped adding new features to EWS back in 2018, while in 2023 it announced that it would start disabling the protocol in Exchange Online from October 2026.

Source: PSA: Apple Mail on Mac May Stop Syncing Microsoft 365 Accounts Today – MacRumors