Group based licensing supports the coexistence with Direct license assignment to users. This means that from the AAD portal we can directly assign a license to a user that inherits a license through a group. Right now this is not possible through powershell which is a problem when trying to assign licenses on pilot scenarios.

Set-AzureADUserLicense -ObjectId $msolUserObject.objectid -AssignedLicenses $AssignedLicenses
Set-AzureADUserLicense : Error occurred while executing SetUserLicenses
Code: Request_BadRequest
Message: User inherits a license from a group membership and it cannot be directly modified on the user. License Sku: ENTERPRISEPREMIUM, Account:

Please add this functionality.