you You can create a group of people and use these groups for several reasons, like permissions, distribution, notification, and so on. 
different groups of people. These can be departmental or interdepartmental groups. These groups can be used for different activities, e.g.:
- settings of permissions,
- distribution of documents and information and/or
- notification
on the Group page, the list of the groups is on the left side, when you select one of them, the member list will be loaded on the right side.
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