Before you configure replications to the cloud, you must deploy the vSphere Replication appliance on the source site and set up your environment to enable connections to the cloud. Installing vSphere Replication for Disaster Recovery to CloudvSphere Replication is distributed as an OVF virtual appliance. Upgrading from Earlier Product VersionsYou can upgrade vSphere Replication 5.5.x and 5.6 to vSphere Replication 5.8. How vSphere Replication Connects to CloudWhen you create a connection to the cloud, the vCloud Tunneling Agent in the vSphere Replication appliance creates a tunnel to secure the transfer of replication data to your cloud Organization. Configuring the Connection to the CloudIn addition to installing and configuring the vSphere Replication appliance, you must configure the connection to your cloud provider. Configure NTP Synchronisation in Your EnvironmentTo ensure that logs on the source site are easily correlated with the logs on the cloud site, you must synchronize the time on the vSphere Replication appliance in your environment with an NTP server.