Configuring preferences and options in Outlook.com
My problem is: the "Personalized email address" ("Get Started") option is missing.
On 2/20/2020, 8:28 AM EST, Outlook.Com support (Helpshift case 806832) says:
Your concern has been escalated to the Outlook.com Research Team.
... we had a few other users who reported to us with the similar issue and we engaged our Engineering Team to investigate this further. They are in a process of deploying a fix for all the affected accounts worldwide, including yours. The fix will be deployed on February 20th, 2020 and you should be seeing the Personalized email addresses section in your account by the end of the day.
It is working for me now. Thank you to those that were willing to jump through all the hoops to get it fixed.