WVD Session Desktops deployed but getting Gateway Error

[Jchunggg]

Oops, we couldn't connect to "Session Desktop"

We couldn't connect to the gateway because of an error. If this keeps happening, ask your admin or tech support for help.

[#2 · Accepted solution]

@Jchunggg: The root cause might have various reasons. We recommend to leverage Windows Virtual diagnostics to learn more about this issue: https://docs.microsoft.com/en-us/azure/virtual-desktop/diagnostics-log-analytics. At the end of this article you will be referred to a list of common service external errors. 

If the error is marked as service internal error you will want to work with Microsoft support.