Hi Stewart,
Thanks for the information. Now, the situation is that: the PF mailbox cannot be found, but it does indeed exist. According to the symptom, it seems the PF mailbox is corrupted from backend. Given this situation, I’d like to forward this information to relevant team for further analysis.
We have collected the necessary information for further troubleshooting and looked into the symptom. We still need to collect your tenant information. We have sent a private message to request it. (Click Private messages on the right side of the community site -> Click the subject to view the message -> reply to the message).
With the tenant information, I can help you escalate the issue to relevant team and engage an engineer to work with you. If necessary, you will be contacted via email to continue working on it. We will share more information to the community once we achieve an outcome.
Thanks for your time and efforts.
Regards,
Young