Thunderbird not showing extant folders/not deleteing grey folders.
Running Thunderbird 52.8.0 (32 bit) with the mail supply from Office 365.
1. I have a series of Grey folders - almost all are empty. If I delete them they disappear then reappear???
2. I have created some new folders in Outlook that don't appear when viewed form Thunderbird.
I would prefer to use Thunderbird as my front end.