# Activating certificate base license and obtaining the license file from a different computer

## Activating and obtaining license file for a certificate base license on a Lumerical FlexLM installation without Internet access.

This article show the process to activate and obtain the license file for a certificate base license on a computer with Internet connection.

### This demo shows a Windows desktop with Internet access.

2. Open and run the FlexLM activation utility.

3. Navigate to the Certificate Based Activation and select Manually Enter MAC Address.

7. Click Activate

8. You will be prompted that it will install the license file in this FlexLM installation. If it indicates that the license was successfully activated and installed on this FlexLM installation, take note of the “license filename”. And copy this from:

"C:\Program Files\Lumerical\Lumerical-FlexLM\licenses\LUMERICL\"


Otherwise, you will be prompted to Save the license file into a location where you have write access. Save the license file with your desired filename.