So, small note to all developers out here:

If you provide a Serverside program to update your software in a network, like M$ WSUS to remove internet traffic,
Please consider not to introduce Bugs in your newest version that make this Service unusable and patch it out later.

Microsoft did exactly this with the Anniversary Update 1607 last year.

Now, after each installation I have to install the most important patches manually to use the WSUS. Because when I go directly i get the newest version that is not tested in our environment. :(

This is From Sysop to Dev :-)