I have a serious problem.
Our Windows Server 2012 R2 with MS Exchange on it refuses to install Windows Updates. I need to repair it using DSIM-Tool, which needs full internet access to download repair components from MS servers.
To not destroy the working Exchange installation I want to try the repair steps in a virtuel lab before doing them on the production system. But DISM always stucks on 40% telling me that it cannot download the needed packages.
I tried setting a proxy in winhttp, but it does not work. I think I need full internet access from my virtual lab. How can I achieve this?
We also thought of appling and testing update of other software in a vLab before installing them on production system, but we have many software that cannot uses proxies and/or the update client cannot use it.
What about implementing a transparent proxy in the ProxyVM or simply make it possible to enable a full NAT?