I had to ensure skype for Business running on my PC does not start automatically.
Here are the steps to follow:
- Open System Preferences.
- Click Users & Groups.
- Click Login Items.
- Select the app or apps you do not want to start automatically and
- Click on the minus “-” symbol to remove the app(s).
Note: You can also configure your apps to launch automatically by clicking on the + button and browsing to the desired app.
When this is done, user log-off of the system is required to ensure the changes are applied.