Dynamic Storage Technology requires that all users of the shadow volume be users that are defined in eDirectory. For information, see the NetIQ eDirectory 8.8 SP8 Administration Guide.
SMB/CIFS users must be enabled for Linux with Linux User Management. This is true for NCP volumes on Linux POSIX file systems (Ext3 and Reiser) and for NSS volumes on Linux and NetWare. The OES 2015 SP1: Linux User Management Administration Guide describes how to Linux-enable users for an OES 2015 SP1 server.