You can use the ArcGIS Online organization that is included with your ArcGIS Desktop license.
Members with an expired add-on license will not be able to use the license.If you have ArcGIS Enterprise, there are two ways to configure ArcGIS Pro Named User licenses. Members with an expired user type will not be able to sign in. Upon the expiration of any license in your organization, you must unassign the expired license so your organization's members are only assigned valid licenses.
This can happen if you assign licenses to your members but are later entitled to fewer licenses, such as if you make changes to your maintenance agreement or you are using trial licenses. It is possible for your organization to exceed the number of licenses available, resulting in a negative number available.Each product has a corresponding card on the licenses page that shows the number of add-on licenses available to assign and compatible user types.A custom administrative role must include the privilege to manage licenses for members to use this functionality. Only administrators of organizations that have been provisioned for apps can use this functionality.If no administrative contacts are set, the oldest administrator account in the organization or the Initial Administrator Account will receive the email notifications. These members will begin receiving emails 90 days before a license is due to expire, and will continue to receive notifications at set intervals up until one day before expiry. At 10.8.1, you can configure email settings for your organization's administrative contacts to receive automatic email notifications when licenses in your organization are about to expire.
ArcGIS Pro users who are already working offline when this setting is enabled will be allowed to check back in, but any future attempts to take an ArcGIS Pro license offline will generate an error. To do this for your organization, an administrator or a member with licensing privileges must enable the Prevent members from taking ArcGIS Pro offline setting in the ArcGIS Pro section of the Licenses tab.
Organizations requiring more control over offline usage of ArcGIS Pro can prevent all ArcGIS Pro licenses in the organization from being taken offline.Your organization needs to be provisioned for ArcGIS Pro or specific additional products such as ArcGIS Navigator before you see those products on the Licenses tab and can manage add-on licenses for those products.Find the member whose profile you want to view, click the More options button, and click View profile.) (Go to the Organization page and click the Members tab. If you're not sure what apps a member can already access, view their profile to see the licenses included with their user type and any assigned add-on licenses.
For example, a member assigned a GIS Professional user type already has a license for ArcGIS Pro, so you don't need to assign ArcGIS Pro to that member as an add-on license.