I am wondering if anyone has encountered similar issue. I am using Mail (v16.0) on macOS Sonoma (14.5) on a 2020 iMac 27". I have several email accounts set up, including an iCloud account and an Exchange (Office 365) account. When I respond to an email using the 'Reply All' button from the Exchange (O365) account, my email address is automatically added to the CC field, which is quite frustrating. This issue does not occur when I use the 'Reply' button. In the Mail Preferences under Composing, I have "automatically cc: myself" unchecked. This problem is happening exclusively with the Exchange (O365) account. When I used Outlook with the same Exchange account, this issue did not occur.
