WhatsApp update let group admins restrict members from sending messages to group
By: Team Ifairer | Posted: 04-12-2017
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"A group can be restricted once every 72 hours but thanks to the 2.17.430 beta, we discovered that WhatsApp will be finally able to change this value from the server," the website said.
The Restricted Groups feature, currently disabled by default, can be expected to be made available via a stable version release in the near future.
source: gadgets.ndtv