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Replying to channel messages
When you reply to a Question or To Do in a channel, you reply directly to the person who issued it. Optionally post it back to the channel so everyone can see what’s been done.
Questions and To Dos are removed from everyone’s Regarding inbox once the message is answered.
FYIs are sent to everyone individually.
If everyone in the channel dismisses your message, you’ll be notified that your message went unanswered.