We’ve received report from our monitoring servers about massive packet loss on the Exchange hosting network. Upon investigation, it appears to be a routing issue with one of the main providers to the core router. We’ve initialized fail over mode and traffic is now routing through our alternative provider. Customers may have experienced a brief disconnection as Outlook lost connection through the old routes and discovered the new routing for the Exchange network.
Datacenter Network Failover – ExchangeDefender Network Operations