Found below in Document ..
https://support.emc.com/docu85188_Data-Domain-6.1-Security-Configuration-Guide.pdf?language=en_US にはthe SetUser Id, Set Group Id, and Sticky bits are used for a number of special cases.
Access control is managed through a standard Linux client or Data Domain system
CLI administration environment with permissions to do so. （Page 17 ）
Means it should be ok to set ...