You're connected to an Exchange Server mailbox. You're using Microsoft Outlook LTSC 2021, Outlook 2019, Outlook 2016, Outlook 2013 or Outlook for Office 365. Applies to: Outlook for Office 365, Outlook LTSC 2021, Outlook 2019, Outlook 2016, Outlook 2013.Only a subset of your Exchange mailbox items are synchronized in Outlook
