Hi @Verma, Mayank
Does this second owner refer to the team owner?
Has this user been added to a private channel but is not displayed in the channel list?
For private channels, when you create a private channel, only the channel owner is in the channel, and everyone else (including team owners) needs to be added by the channel owner to enter. Based on your description, follow the steps below to check if the user has been added to this privacy channel.
For more details about private channel, you could refer to this article.


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