Exchange 2016: Change size limit for ActiveSync
Size limits for emails can be set in several places with Exchange Server 2016. There are size limits for mails not only for receiving and sending connectors, but also for ActiveSync, Exchange Web Services (EWS) and OWA (or Outlook on the Web). The standard limit for ActiveSync clients is 10 MB, while the limit for EWS is 64 MB. Read more