Kubernetes pod list somehow tied to computer?
If you have done everything correctly regarding his roles Manage access to Azure resources using RBAC and the Azure portal.
I think he's just missing :az aks get-credentials --resource-group myResourceGroup --name myAKSClusterBe sure to put correct resource-group and name with the get-credentials.
After that he can test with kubectl get all --all-namespaces to check if all resources across all namespaces are available to him.