- Log into the server running Exchange 2013 on your network
- Open up PowerShell
- Enter “Get-OWAVirtualDirectory | Set-OWAVirtualDirectory –LogonPageLightSelectionEnabled $true”
- Restart ISS by entering the command “iisreset” in PowerShell
- Now when you next go to OWA you will see a check box for using the light version of OWA