The Host can send messages to all users in a meeting’s waiting room by selecting To: Everyone (in Waiting Room) from the chat pane in the desktop app. How can this be done with the Windows Client SDK?
To Reproduce(If applicable)
Start a meeting with the Client SDK which has the waiting room enabled and auto admit waiting room users turned off. Have a user join the waiting room but do not admit them. Try to use the SDK’s chat controller to send a message to all users in the waiting room only (not all users in the meeting).
Device (please complete the following information):
Windows 10 Desktop
When the host sends messages to everyone in the waiting room a chat event is fired for user 4294967295 (seems to be a special user ID, like 0 means “Everyone (in meeting)”). However, trying to call SendChatTo() with this userID fails with SDKERR_INVALID_PARAMETER.