I often see in SCOM Environments the Error “Operations Manager cannot connect to the Web service” when you want to Import or download Management Packs from the Microsoft Online Catalog.
Most of the time this happends because a Proxy Server is using in the customer Environment. To define a Proxy Server for the SCOM Console you Need to add the following lines at the buttom of the file
<system.net> <defaultProxy enabled="true" useDefaultCredentials="true"> <proxy usesystemdefault="True" /> </defaultProxy> </system.net>
Looks like this.