Using New Outlook on Windows for professional communication and productivity
Hi Jane,
Thank you for reaching out.
The ability to pin emails depends on the version of Outlook being used. This feature is available in New Outlook for Windows and Outlook on the web, but it is not available in Classic Outlook for Windows or Legacy Outlook for Mac.
Since you indicated that you are using New Outlook and your messages are already sorted by date, the pin option should normally be available. Please verify that the New Outlook toggle is enabled and that Outlook has not switched back to Classic Outlook. You can also sign in to Outlook on the web and check whether the pin option appears there.
I hope the information I shared earlier was somewhat helpful in addressing your issue. If the feature is available on the web but missing from New Outlook, please let me know whether it is missing from the right-click menu, the message toolbar, or both.