Using Classic Outlook on Windows for personal email, calendar, and contact management
I'm experiencing the same problem with only one user of my organization. A simple email sent to other organization's users display the "connector placeholder item" and seems hanging and not displaying the body of message (but double click on Outlook OWA 365 opens the email).
Unchecking "display sender image" does not solve the issue.
Wainting for other suggestions, thank you.