Thats a very tainted statement that I do not want to let stand uncorrected. As a matter of fact the day the update was published for our customers I already made the offer to send out evaluation keys for those that really do not want to buy a subscription (I still think that 75€ per year for 5 users is a very reasonable price).
Proof: Mails in Outlook 2016 no longer consistent after upgrade to Kopano Core 8.6.8.2 - #20 by fbartels