Creating Replication Jobs in Backup ... - Veeam Software
https://www.veeam.com/kb152210.02.2012 · By default, Veeam Backup & Replication preserves the format of replicated VM disks. If necessary, you can configure the job to change the disk format. For example, if an original VM uses thick disks, you can change the format of replica disks to thin provisioned, and thus, save on disk space required to store replica data.