Outlook 2025 Calendar Sync Issues. 4.on the general tab, choose clear offline items. I use outlook on mac and i'm an ea for 5 executives, managing calendars for all.
The possible reasons could be the wrong calendar selected for sync, the calendar not being visible, background app interference, outdated outlook app or the calendar app, and so on. Sometimes, it may not work properly due to various reasons, such as network issues, account settings, software conflicts, or server problems.