Hi, I've recently setup Thunderbird to work with our Exchange Server in our office on a laptop using the ExQuilla add-on which works great! I've been trying to add Lightning to the setup but it doesn't seem to be doing anything? I'm not seeing any visible difference or new UI for this and I'm definitely not seeing any Lightning options when I click options in the Extensions manager. The remainder of the office uses Outlook and we send a lot of attachments in Calendar appointments which aren't showing in the standard Thunderbird Calendar and I believe Lightning resolves this? I've installed Thunderbird 52.7.0 and Lightning i l literally downloaded today (10th April) Any help would be great, Thanks, Dave