Symptoms
Assume that you try to search messages in the Search Chat Room History dialog box by selecting dates in the From field and To field in Microsoft Skype for Business 2016. After you start the search, you may find that incorrect results are returned.
This issue occurs when you are in regions other than US where the date format differs from mm/dd/yy.
Resolution
To fix this issue, install the February 6, 2018, update (KB4011662) for Skype for Business 2016.
