When creating a share that you would like to use replication, enable this for the share.
Below are the instructions. Assign a Snapshot volume then go to Maintenance -> Backup -> Data Replication. There you will see how to create a new data replication task. Click on the ? for more details on the subject.

Setting replication for the specified Share:

This function allows you to set configuration for a data replication of the share.
In order to enable replication for a share, check box Use data replication.

Note
It is recommended to set Login name, Password and list of Allow access IPs that have access to the share, in another case everyone will have access to the share.