1. Start TeamViewer on your computer.
  2. Ask your partner to start TeamViewer or TeamViewer QuickSupport on their computer.
  3. Ask your partner for their TeamViewer ID shown in the TeamViewer application.
  4. Select the option Remote support and enter your partner's TeamViewer ID in the field Partner ID (Windows authentication can be used for all other connection modes as well).
  5. Click on Connect to Partner.

The TeamViewer authentication dialogue will open: 

  1. Click on Advanced. The dialogue displays advanced settings.
  2. In the drop-down field, set the authentication method to Windows.
  3. Enter your Windows (Admin) login, the domain (if used) and the Windows password.
  4. Click on Log On.

Guide from - https://community.teamviewer.com/t5/Knowledge-Base/Controlling-the-UAC-on-remote-Windows-PC/ta-p/25595