By integrating the latest in robust high availability technologies into the Active Mail platform we are able to ensure that we deliver against our 100% uptime SLA with money back guarantee.

Approaches to High Availability
The Active Mail platform uses a mixture of two High Availability methodologies to ensure that the service is functional at all times. These two approaches are load balancing with failover clustering (generally used for front end application servers) and active passive clustering (generally used for servers that host data).

High Availability for Access to Data
All servers that host application data (such as Exchange 2007 Mailbox servers) are configured in active / passive clusters. Data is replicated between two servers so that there are multiple independent copies of the data hosted on each application server. A heartbeat exists between the active server and the passive server. Should the active server fail the passive server is ready to pick up the application load within minutes.

High Availability for Access to Services
All servers that act as front end gateways into data services are configured as load balanced clusters with failovers. All servers in the cluster are active. If a server fails within the cluster the load will be automatically distributed to other servers within the cluster.