Hi Eugene,
Thanks for your update.
In this situation, I'd like to request your Office 365 tenant information for further troubleshooting. If possible, could you send me the tenant information via private message (PM)?
I have sent you a PM, and here are the steps to check the private message:
1. Please go to "Your details" section on the right side of the community site.
2. Click Private messages.
3. Click the subject title of the response to read the message.
Thanks,
Bourne Zhang