Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi there, this helpful link has been posted before in this forum and solved the problem. Very easy fix! What it did not fix is if you have folders into which you filter incoming mail (trying to see how i can make this technique work for that) but the "external" tag will no longer appear in your inbox.
https://superuser.com/questions/1763932/how-do-i-get-rid-of-the-external-label-in-outlook