Assume that the display language of Microsoft Skype for Business 2016 or Microsoft Lync 2013 (Skype for Business) is French, Romanian, or Croatian. When you press and hold (or right-click) a user on the Contacts list, and then you click the Find Previous Conversations button, no items are found. Also, the Microsoft Outlook window that contains the expected response doesn't open.
This issue occurs because the localization string in the French, Romanian, and Croatian languages is incorrect.
To fix this issue, install the update for Skype for Business 2016 or Lync 2013 (Skype for Business).