[gravitas]

I disagree - the feature they need is better calendar integration with Exchange based services and the Exchange address book (GAL). As a corporate user this is the Achilles heel and always has been for 20 years, like it or not Exchange is king of the hill in large sprawling companies and Thunderbird has always left it to 3rd party add-ons (some of which they just killed due to the extension redesign) to try and handle.

[spacechild1]

I recently had to buy an such an add-on (Owl), because my umiversity's IT department killed IMAP support and only offers Exchange (which is stupid, but what can you do?).

[gravitas]

Solutions like Owl are actually kind of nice, I have been using a similar one on my phone (AquaMail) for many years and it's worked out great. Thanks for the tip, might give it a shot - I see it's by the same author as ExQuilla which has been around for awhile as well.