For those of you using Exchange Online, Intune, and the service-to-service connector, you may start seeing some additional Exchange ActiveSync (EAS) records in the Intune Console related to recent changes in the Outlook app for iOS and Android. The Outlook app is improving its reporting of EAS IDs to Exchange Online. Previously, Outlook connections appeared as a single EAS ID for each user in Exchange Online (i.e. a user could connect an iOS and Android device and have it only show up in Exchange once). Moving forward, each device connecting to Exchange Online through the Outlook app will have its own EAS ID. While this is an improvement, this means your existing connections will get a new EAS ID and will cause additional connected devices records.
Read more at source: https://blogs.technet.microsoft.com/intunesupport/2016/07/20/support-tip-seeing-additional-exchange-records-in-the-intune-console/