Well, honestly not sure if this is suitable for this forum, but basically there is an issue with Office 2016 that had a sudden onset and for totally unknown reason. I believe it happened after Office did some automatic self update. Everything works fine, except when I try to save to a network share drive on a windows server machine, Word or Excel or PowerPoint simply crashes and disappears without any message whatsoever. All other computers work fine and are able to save and read from the network share, but they are Windows 10 machines so perhaps that's the difference. It is also impossible to open any Office file directly from the share, Office loading logo will show briefly then disappear without any information, a silent crash. I have to first drag the file out of the share using file explorer, then open it from a local drive. Same goes for saving, I have to save locally and then drag the file onto the server. Any other program (notepad etc) can save and read directly from the share no problem. Only Office fails at this.
I tried to run extensive online repair of the Office, I even removed it completely and installed again - nothing has worked.
The server did not have any interruptions or updates during the time this problem came up. I'm kinda at a loss with it.
Other than this the machine runs great and even installed new updates that would fail before.