Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
The person who is the local Office admin in your organization should be able to contact Microsoft. See https://learn.microsoft.com/en-us/office/ltsc/2024/overview and https://learn.microsoft.com/en-us/office/volume-license-activation/plan-volume-activation-of-office?toc=/office/ltsc/2024/toc.json .