Exchange Synchronization health check

1. Checks if Exchange Integration is enabled in <My Profile> | Administration | System | System Behavior.
2. Checks if the exin_SyncEnabled column value in the EcngIntegration database table is set to ON.
3. Sends an HTTP request in the following format:

   http://<ExchangeIntegrationEndpoint>/$service/status

   Where <ExchangeIntegrationEndpoint> is the value of the exin_EndpointURL column in the EcngIntegration database table.