Firstly, if you are using Update Management or the Update Management wizard to push the updates you can export the task details to get the status on the updates that were installed. This can be added to a task to happen automatically if you are using these tasks.
Otherwise you can run one of the Computer Update Status reports under Administration and Reporting -> Reporting -> WSUS Reports -> Windows Server Update Services Analytics.
I tried running one of the reports as you suggested and got the following error:
No management servers available to process the request. Thinking I might have to check my management groups one has all my WSUS servers and one has none. I might need to look into doing an initial setup again to get my Patchmanager in line.
Thanks for the reply.