'New folders created in finder with 'user:user' default ownership rather then 'user:group of parent dir'

Having issues when a Mac user on finder is creating new directories on our NFS system. The parent directory has the permission 2775 drwxrwsr-x. (this permission is for all directories on the tree) but when new folders are created it is with the 'user:user' ownership rather then 'user:group of parent directory' .

Does anyone know if there is a way to fix this issue with a permission setting or is this is an issue specific to finder and if so is there a setting I can change so that the permission of new directories created belong to the group of the parent?



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