Resolved: The issue has been resolved. Users should now be able to start private chats with users they have not previously chatted with.
What is happening? Microsoft Teams currently has limited messaging availability. IST is investigating with the vendor.
What is the impact? Users trying to start a new private chat with users they have not previously initiated a chat with are receiving a 'failed to send' error.
Questions or concerns? Please contact the IST Service Desk, firstname.lastname@example.org, ext. 44357.