This has been asked before and sort of answered here with a workaround.
However I'm hoping that there is a more direct solution.
I need to use permission groups to restrict access to content for an extranet portal. I don't want group members to see who else is in the group - it's commercially-sensitive information.
The only options for 'Who can view the membership of the group?' are 'members' or 'everyone'. I need an extra option: 'owner' (which is available for 'edit group membership' - I'm slightly confused why this isn't also an option out of the box for 'view membership'...)
If anyone knows how to implement this across a site collection please let me know.
Alternatively if anyone has successfully implemented the linked workaround I'd be keen to see the code.
We're on SharePoint 2013 (hosted) in Office 365.
Thanks
-E
sitepath/_layouts/15/groups.aspx
and then find the group in the list.