Applicable to End Users
If you have a large number of unread conversations, you can mark all of them as read with a single action instead of opening each chat.
Marking All Chats as Read
To mark all your chats as read:
Open the Chats screen.
Select Mark All As Read.
All unread conversations are marked as read. The unread indicators are removed from the chat list, the messages within each conversation are updated to the read state, and the read status is sent to the server.
Marking Chats as Read While Offline
If you mark chats as read while the device has no network connection, the read status is stored on the device and sent to the server when the connection is restored.