When you update User records with Data Loader, you will notice that you are unable to find a field to update the UserLicense that is associated with a User.
This article explains why the User License field can't be updated directly with Data Loader, and how to mass update licenses by updating each User's Profile instead.
If you review the SOAP API documentation for the User object, you will notice that the license associated with a User cannot be selected when you work with the User object.
Instead, you can use Data Loader to associate a profile with the desired Users. Since every Profile is tied to a license, updating the profile associated with a User will also update the license.
Once the new profile is assigned, the User will automatically be changed to the license associated with that profile.
It is not possible to downgrade user licenses. Review Change a User License from Chatter to Salesforce and check this idea: Capacity to change Existing User Licence to Chatter Free.
The following video demonstrates how to mass update User licenses using Data Loader, including how to export User IDs, query Profile IDs, prepare a CSV file, and run the update operation on the User object.
000387184

We use three kinds of cookies on our websites: required, functional, and advertising. You can choose whether functional and advertising cookies apply. Click on the different cookie categories to find out more about each category and to change the default settings.
Privacy Statement
Required cookies are necessary for basic website functionality. Some examples include: session cookies needed to transmit the website, authentication cookies, and security cookies.
Functional cookies enhance functions, performance, and services on the website. Some examples include: cookies used to analyze site traffic, cookies used for market research, and cookies used to display advertising that is not directed to a particular individual.
Advertising cookies track activity across websites in order to understand a viewer’s interests, and direct them specific marketing. Some examples include: cookies used for remarketing, or interest-based advertising.