She mentioned that “the subject is not editable in the collapsed header but is editable if you expand the header (using the caret on the lower right of the header).” Here’s what the minimized header looks like. I did an Internet search and found a solution documented by Outlook MVP Diane Poremsky in a forum. If you wish to add a letterhead to your message template, then right click within the Signature text edit area, then select Insert Image. I tried a few things and also restarted Outlook but nothing helped. Tip: You can highlight the information in that box, press Ctrl+C to copy, and paste it into Notepad or Word to see the entire header at once. Major new features released during Outlook 2013. Header information appears in the Internet headers box. Until then, there are still plenty of new features in Outlook 2016 to use and discover. I have never encountered this problem before. Double-click an email message to open it outside of the Reading Pane. Today I tried to edit the message in Outlook 2006 and noticed that it won’t let me change the message. I know a lot of other people use the same technique and modify their message subject.
If there is any update or you have any other consult, please feel free. Please be kindly to have a try according to Change or update email account settings in Outlook for Windows.
If you do not mean that, and you mean that you want to access the service setting like the following picture.
It’s just my way of adding the metadata to a message to quickly locate the message when I do the search. If so, please click File> Account>Change>More>Advanced. This helps me quickly glance at the subject in a folder, or do a search on the metadata, and easily locate the information. The blue color shows up prominently in your Outlook 2013/2016 inbox when new email messages come in, with a bold blue subject line and a blue bar indicating. For example, when I book a flight and receive my itinerary from the airline, I change the message subject to reflect my trip to the city and the dates for my trip. On the Message tab, in the Options section, there is a little button with an arrow in it. I frequently edit the message subject in Outlook 2016. Double click on the email message so that it is opened in its own window.