BCC in Outlook2016

Here's the case:
PersonA is BCC'd on an email because sender does not want others to know that Person A is getting the email.

I read about MailTips being able to put up a warning if PersonA  hits ReplyAll

I can not find any info on how to sset this up
Roberta GelbAsked:
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Travis RodgersIT AdminCommented:

This option is only available in Outlook 2016 and 2019. This can be done by creating the rule. Please check the complete information here: https://www.msoutlook.info/question/you-may-have-been-bcced-warning
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