Exchange 2019 – Event ID: 4999 – Outlook app on Android and iPhone not sending or Receiving MailExchange 2019 – Event ID: 4999 – Outlook app on Android and iPhone not sending or Receiving Mail

Exchange 2019 - Event ID: 4999 - Outlook app on Android and iPhone not sending or Receiving Mail Microsoft.Exchange.Data.Storage.InboundConversionOptions.CheckImceaDomain(String imceaDomain) at Microsoft.Exchange.Data.Storage.OutboundConversionOptions..ctor(String ...