Assume that you're running a computer that has the system locale set to Thailand, and you have a Microsoft Outlook account (MAPI profile) configured. You open an instant message (IM) conversation in Microsoft Skype for Business 2016, and then you press the grave accent key (`) to change the input keyboard from English to Thai. In this situation, Skype for Business 2016 freezes. This issue also occurs when you press the grave accent key while the client is loading.
Note To set Thailand as the system locale on the computer, first set the current location to Thailand by selecting Control Panel > Region and Language > location > Thailand. Next, select Control Panel > Region and Language > administrative > Thailand, and then restart the computer.
To fix this issue, install the June 7, 2016 update (KB3115087) for Skype for Business 2016.