Hello Sally,
A Global admin, Power Platform admin, or a Dynamics 365 admin does not need a license to be enabled in a Common Data Service environment. In case a user is not licensed it will be set in the Administrative Access Mode.
By default, all licensed users are created with an access mode of Read-Write. This access mode provides full access rights to the user based on the security privileges that are assigned. That's why I asked to test this action in the initial state.
If you would like to get more information on this area, please check this documentation:
docs.microsoft.com/.../create-users-assign-online-security-roles
If any further questions, I will be happy to assist.
Please mark as verified if the answer is helpful.
Thank you for using Microsoft Dynamics CRM Communities.
Cláudia Amaral
Support Engineer
Microsoft Dynamics CRM