Do you mean to assign Phone Standard licenses to resource accounts?
License purchases and assignments are made at the Microsoft 365 admin center. For each resource account, you must assign a Microsoft Teams Phone Resource Account license or Teams
Phone Standard license. You could assign licenses by following the steps below. After the license is assigned to a resource account, there is a wait time for it to take effect.
- In the Microsoft 365 admin center, expand Users, then select Active users.
- Select the resource account to which you want to assign a license. The resource account's user pane will appear.
- On the Licenses and Apps tab, under Licenses, select Microsoft Teams Phone Resource Account.
- Select Save changes.
For more details about Microsoft Teams Phone Resource Account, you could refer to: https://learn.microsoft.com/en-us/microsoftteams/manage-resource-accounts
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