Group members notification of Folder/File sharing
When adding a new user in a group. Notify the user of the group folder access.
Add the User to the Group 1, If Group 1 have access to Folder A and Folder B.
Notify the user of his new access to Folder A and Folder B.
Share Folder C with group 1. Inform Group 1 users of their new access to Folder C.