Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi, Kevin
Good day!
Thank you for posting to Microsoft Community. We are happy to assist you.
According to your description, the issue of your concern that you were not able to find the attribute on Exchange Online.
For the given issue which is out of experience and knowledge, therefore, we would like to refer you to contact Microsoft Online tech support, please refer below steps:
Sign in to Microsoft 365 with your Microsoft 365 admin account, and select Support > New service request.
If you're in the admin center, select Support > New service request. (You need login with an administrator account.)
Microsoft online tech support team with higher permission and they will give a more professional suggestion to you.
Thanks for your precious time and your understanding would be highly appreciated.
Sincerely,
Alex | Microsoft Community Moderator.