---
title: "Activate a license"
canonical: "https://help.vicon.com/space/Evoke15/10327496/Activate%20a%20license"
format: markdown
---
After you have received a license file from Vicon Support, you must activate it before you can start using Vicon Evoke.

**To activate a license:**

1. Check your email for a message from Vicon Support. The license file (named *Evoke.lic*) is attached to the email. If you have not received a license file, request one as described in [Request a license](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10325592).
2. Save the license file (**.lic*) to the Windows desktop of the machine for which you have a license (or any other suitable location).
3. Start Evoke and in the **Vicon Product Licensing** dialog box, click **Activate License**.
4. Depending on whether you are using the file as it was received from Vicon Support or as a text string copied from the file.
  - In the **License File Activation** field, type or browse to the location of the license file (*.lic*) and click** Activate from File**; or
  - Copy the text to the **License Activation string** field and click **Activate from String**.
5. Click **OK**.

> ✅ **Tip**   
> ✅ You can only deactivate a network license from the relevant license server machine, not from any of the client machines.