I've just upgraded to Visual Studio 16.11.5. When I do I get errors trying to connect to Azure devops. Azure shows the connection as successful but Visual Studio gives you a helpful message saying
"Failed to fetch from the remote repository".
It tells you to look in the output window, then the output window tells you to look in the output window :-)
NB This is different from similar stack overflow posts because this is specific to this release of Visual Studio. Prior releases did not have this issue. We've been able to verify this locally on a machine which worked before the upgrade and didn't after