Hi, can I ask when you finally repair following bug (https://www.uc.solutions/Skype_for_Business/Skype_for_Business_Client/General/Received_error_message_%22this_message_wasn%27t_sent%22_when_sending_IM_in_Skype_for_Business)? With this bug Skype for Business is useful as "racing homer". Lot of my colleagues getting error "this message wasn't sent" even message was sent and delivered.. lot of times they get this message but message is really undelivered. So I didnt get half of their messages. Lync on Mac was working quite well, I do not know how you even can release (and sell) this software with this kind of bug (and keep it there for months!). It`s really embarrassing for company as Microsoft to have this kind of bugs in software. BR, Jindrich