It sounds like there may be a permissions issue or a delay in the system updating the support plan visibility for other users. As a global admin, you have access to see the linked support plan, but subscription owners might not have the same visibility due to their role or the way the support plans are configured in Azure.
Here are a few things you can check:
- Role Permissions: Ensure that the subscription owners have the necessary permissions to view the support plan. Sometimes, specific roles may limit visibility.
- Linking Process: Confirm that the support benefits were correctly linked to all subscriptions. If there was an issue during the linking process, it might not reflect for all users.
- Support Plan Activation: There might be a delay in the activation of the support plan for all users. It could take some time for the changes to propagate through the system.
- Contact Support: If the issue persists, it may be best to contact Microsoft support for assistance, as they can provide more detailed insights into your specific situation.
You can create a support request through the Azure portal to get further help on this matter.