Licenses for Office 365 Services are managed through the Microsoft 365 admin center. To assign or view licenses, you can navigate to the Microsoft 365 admin center (https://admin.microsoft.com), expand Users, and select Active users:

Additionally, you can review what services are assigned to users through the use of the Microsoft Online Services or Azure Active Directory PowerShell modules.

For example, to review users that have been assigned a Power BI license, you can run the following command:

Get-MsolUser -All |? {$_.Licenses.ServiceStatus.ServicePlan.ServiceName -like "BI_AZURE*" -and $_.Licenses.ServiceStatus.ProvisioningStatus -like "*Success*"}