Install License

For more information about Installing a license and the Update License function, please review:
Veeam ONE Deployment Guide > Updating License

1. On the toolbar, click Help and select License Information.

2. In the License Information window, click the View Installed Key link.

3. In the Installed License window, click Install License

Remove License

For more information regarding License Expiration please review: 
Veeam ONE 11 Deployment Guide > License Expiration

While it is uncommon for a scenario to arise where the license must be removed from Veeam ONE, it can be done. Removing the license from Veeam ONE will revert it to the Community Edition feature set. The Veeam ONE license can only* be removed using REST API.

^{*If the Veeam ONE server is managed from a Veeam Service Provider Console, the license can be removed remotely.}

The steps below will demonstrate how to remove the license using the built-in Swagger UI.

1. On the Veeam ONE server, open a web browser and go to https://<hostname>:1239>/swagger/index.html
2. In the top-left corner of the Swagger UI Webpage change the definition to Veeam ONE REST API v2
3. Authorize by following Step 1 and Step 2 on this page: https://helpcenter.veeam.com/docs/one/rest/authorization_example.html
   (read step 2 carefully)
4. Once Authorized, expand the Licensing section and find the entry for: POST ​/api​/v2​/license​/remove Delete License
5. Click the "Try it out" button.

6. Then, click the "Execute" button.

After clicking Execute, the page will update to display a "Server response."

If it returns Code 200, the license was removed successfully.