Provided the Microsoft article https://docs.microsoft.com/en-us/microsoft-365/admin/manage/manage-deployment-of-add-ins?view=o365-worldwide#deploy-an-office-add-in-using-the-admin-center.
The Microsoft 365 admin center no longer has a "Services & Add-ins" section. Now, you go to "Integrated Apps" to upload the manifest XML file. I have not checked if there are any other changes. This is referring to: Phish Threat: Deploy the Outlook plugin (sophos.com)
This is now updated.
Hi Tyler White,
Thank you for your feedback. We will look into this and update the KBA accordingly.