I use CASO and MMS. I have created Deduplication folder on both and then make available through OST deduplication folder on MMS to CASO. When i configure policy, first i need create Backup job - no problem here, i use local deduplication folder. But when i create Duplication job (to store in remote folder) , what should i choose  "Media server deduplication" or "Client side deduplication"?

As i know, Optimized duplication sould work, so deduplication job should not work in this case.