Additional features, settings, or issues not covered by specific Microsoft Teams categories
Hello SamanthaJenny,
Thanks for your post in this Microsoft community.
Based on your post, understand that seems you trying to connect your Session Border Controller (SBC) to Direct Routing but having issue, for this kindly verify that you follow the same steps provided in this article and kindly provide us details information about what invites not received from Microsoft via send Private Message only, so based on it we will check and assist you further.
Your kind co-operation will be highly appreciated.
Thanks a lot for your precious time. Stay safe and healthy.
Regards,
Ankita Vaidya