Unable to find resource errors on WSUS

(Unable to Find Resource:) ReportingEvent.Client

If you are experiencing this issue, here’s the fix:

1. On your server running WSUS and IIS, open up the IIS manager.

2. Expand Sites, and select “WSUS Administration”

3. On the right side, under IIS, select “MIME Types”
   
4. Make sure there is not a MIME type for .esd, if there is, you’re having a different issue, if not, continue with the instructions.
5. Click on “Add” on the right Actions pane.
   
6. File name extension will be “.esd” (without quotations), and MIME type will be “application/octet-stream” (without quotations).
   
7. Reset IIS or restart WSUS/IIS server

You’ll notice the clients will now update without a problem