How to display a warning/notice about bcc while you reply all in Outlook?
As you know, if you are in BCC field when receiving a message in Outlook, other receivers cannot see you, but if you accidently use the "Reply All" function to reply the messages, you will be exposed. In this article, I introduce a utility which can warn you while replying all to a message if you are in BCC field in Outlook.
Display a warning about BCC by creating a rule
Display a warning about BCC by Kutools for Outlook
Display a warning about BCC by creating a rule
In Outlook, you can use the rule to display a warning about BCC.
1. Click "Home" > "Rules" > "Manage Rules & Alerts", then click "New Rule" under "Email Rules" tab in the popping dialog.
2. In the "Rules Wizard" dialog, choose "Apply rule on messages I receive", click "Next".
3. In second window, click "Next" directly, a dialog pops out to remind you if continue, click "Yes".
4. Then, in the third window, check "Assigned to category category" checkbox in "Step 1", then click "category" in "Step 2" to open "Color Categories" dialog, click "New", give a name and choose a category color for this new category.
5. Click "OK" > "OK" > "Next", in the fourth window check "except if my name is in the To or CC box" checkbox.
6. Click "Next", keep "Turn on this rule" checked, click "Finish". And click "OK" in the "Rules and Alerts" window.
Now when you received a message and in BCC field, a warning will display in the message window.
Display a warning about BCC by Kutools for Outlook
The above method is a little complex and difficult, and in some cases, the rule does not take effect. If you want to easily and efficiently handle this job, you only need to enable the "BCC Warning" utility of "Kutools for Outlook".
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Click "Kutools" > "Options".

In the Options dialog, under "Reply" tab, tick "Warning me when 'Reply All' to a message that have me in Bcc." checkbox, and then click OK.

Now, when you click the "Reply All" button, a dialog will remind you if you are in the BCC field. Click "Yes" to continue replying all, click "No" to cancel this operation.

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