Hello All
We recently had an issue where icons were missing for all users in OWA, I removed the backend and front end extensions and this seems to fix the issue. However I have one particular use...
Is the user on the same Storage group as the other users that work correctly?
The best thing you can do is enable the OWA logging and see whether it gives you any exceptions.
Also i'm assuming the OWA policies for that user allow the buttons to be shown and that the user is enabled, and can see the buttons within Outlook as well?