Question
If I send an email using the side conversation feature, will the requester of the main ticket also receive it?
Answer
No, side conversations in Zendesk are not visible to the requester of the parent ticket who cannot view the ticket in any enabled help center. They are designed for internal communication and are only visible to the child ticket recipients. This includes the side conversation requester and any CCs or followers.
For more information, see this article: Using side conversation child tickets.