Under 'My account', check or uncheck Automatically start the app when I log on to Windows.
If you don't want Skype for Business for Windows to log you in automatically, or if this option has been deselected on your workstation and you want to re-enable it, you can change the setting as follows: To set Skype for Business for Mac to log you in automatically: For an introduction to UniCom, including how-to PDFs and videos, see