In each of these situations, the From address is different than the account address so Outlook included it in the Reply to all. Outlook is resolving to the copy in your Contacts, not the GAL. You have one or more contacts in Outlook for your own GAL entry and one contains the wrong address.Outlook is using the x500 address, not the SMTP address (Exchange mailboxes only).When people reply to your address, Outlook sees that address as belonging to someone else. The Reply to address in File > Account Settings > More Settings is not the same as your account email address.When Outlook is confused, the possible causes include: If your From address is the same as the address the message was sent to, Outlook can properly identify your address and will not include it in a 'reply to all'. It should only include yourself in the reply to all if the address the message was sent to is not the same as the account address. While this was a common problem years ago, Outlook now does a good job identifying 'who you are'.
I'm seeing too many Outlook users complain that 'reply to all' includes their own address.