You can verify that clients are available as Group Update Providers. You can view a list of Group Update Providers by searching for them on the Clients tab.
You can also check a client's properties. The properties include a field that indicates whether or not the client is a Group Update Provider.
To search for the clients that act as Group Update Providers
In the console, click Clients.
On the Clients tab, in the View box, select Client status.
In the Tasks pane, click Search clients.
In the Find drop-down list, select Computers.
In the In Group box, specify the group name.
Under Search Criteria, click in the Search Field column and select Group Update Provider.
Under Search Criteria, click in the Comparison Operator column and select =.
Under Search Criteria, click in the Value column and select True.
Click Help for information on the search criteria.