For more, see Get help with Microsoft 365 software. Microsoft 365 applications, you can often press F1 or click the question mark on the upper right. If the 'Bcc.' field is not visible, open a new message, and from the Options tab, click Bcc or Show You can use Rules to file these messages elsewhere.

Note that this will send the copy to the Inbox of the person you enter in the 'Bcc.' field, not to that person's Sent Items folder. Tip: If you don’t see the Sent Items folder, click the arrow (>) on the left of your account folder to expand the list of folders. If you have multiple email accounts in Outlook, each email account has its own Sent Items folder.

You can use the 'Bcc.' line within the original message to copy the person you're assisting as a delegate he or she will receive a copy of the original message, but the recipient will not see any names that you list in the 'Bcc.' field. You can find your Sent Items folder in your folder list.(See View another's Exchange calendar or mailbox folders in Outlook for Windows.) Drag and drop the sent message from your Sent Items folder to the other person's Sent Open your mailbox and the mailbox of the person for whom you are a delegate.Otherwise, when sending messages as a delegate, you have two options to have messages appear in the mailbox of the person you're assisting: Sent Items folder, not that of the person who appointed the delegate. Any messages sent by a delegate on someone else's behalf will appear in the delegate's In Microsoft Outlook, sent messages always go in sender's If messages sent from delegates don't appear in your Outlook Sent Items folder

Where to find sent mail in outlook