# How to reserve licenses for a list of users

A customer who has purchased multiple node-locked seats of your application may want to reserve some licenses for specific users.

To reserve licenses for specific users in an organization, an administrator (your customer's administrator) must pre-activate licenses for these users. To pre-activate licenses for specific users, the administrator must:

* Determine the Computer ID of each user, depending on the selected licensing binding method.
* Activate the license for that Computer ID

For example, assuming that you have configured the [QlmLicense.LicenseBinding](https://docs.soraco.co/docs/api-reference/.net-api/qlmlicense/enums/elicensebinding) to ComputerName, the administrator would need to:

* Get the Computer Name of each system.
* Activate the license for that computer either from the [QlmCustomerSite (QLM Self Help)](https://docs.soraco.co/docs/self-help-customer-site/qlmcustomersite-qlm-self-help) or from the [QLM Customer Portal.](https://docs.soraco.co/docs/qlm-customer-portal)

Once licenses are assigned, the Administrator could re-assign these licenses by deactivating a license for a specific user and activating it for another. Deactivating a license can be performed from the [QlmCustomerSite (QLM Self Help)](https://docs.soraco.co/docs/self-help-customer-site/qlmcustomersite-qlm-self-help) or the [QLM Customer Portal](https://docs.soraco.co/docs/qlm-customer-portal)

When allowing deactivations from the QLM Self-Help or the QLM Customer Portal, it is recommended that you implement:

* [Server-side license validation](https://docs.soraco.co/docs/fundamental-concepts/server-side-license-validation)
* Require a connection to the server by setting the [MaxDaysOffline property.](https://docs.soraco.co/docs/faq/maxdaysoffline)

This will ensure that a deactivated computer is not able to run your application once its license has been reassigned.


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