Acer Altos easyStore M2 User Manual page 156

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Changing the group membership
In local authentication mode, you can change which users are members
of each group at any time. user to a group, that user immediately has
access to all the shared folders that the group is authorized to access.
However, if you remove a user from a group, the change does not take
effect until that user disconnects from the shared folder or shuts down
the computer.
For example, the user Alice might be a member of both the Marketing
and Executives groups. The Marketing group might have read-only
access to the Budget shared folder, while the Executives group might
have read/write access. As a member of the Executives group, Alice
would have read/write access to that shared folder. If Alice is currently
connected to that shared folder and you subsequently remove her
from the Executives group, she will continue to have read/write access
to that folder until she disconnects or shuts down her computer. The
next time she connects, she will continue to have access to the shared
folder (since she is still a member of the Marketing group), but she will
be able to only view the files there; she will not be able to add, modify,
or delete any files.
To change the group membership:
1 In the navigation bar, click Users.
2 In the left pane, click Groups.
3 In the Groups list, select the group whose membership you want to
change.
4 Click Edit.
Note: If the storage system uses Active Directory authentication
mode, this button displays dimmed
4 Managing the storage system