title: where is chat history of Skype for Business is stored in Windows 7
body: <p>For Skype application, the chat logs are stored into the main.db file of skype user folder.
  Now I want to backup my chat logs from Skype for business application. I am trying to find out the chat logs file like main.db but it does not exist for business application.
  Where is the Skype for Business stores users chat log in Windows 7?</p>