How to check if the Microsoft symbol server is available, and contact them if not?

Question

When I use WinDbg command .reload /f /v ntdll.dll to download symbol from microsoft symbol server the request always fails as below:

AddImage: C         


        

Answer 1

The official email address for reporting missing symbols is windbgfb@microsoft.com, on this page. Symbols for newly patched files are usually available within 1 week after each Patch Tuesday, so you may want to wait a few days before contacting them if the files are recently updated.

By the way, you should use https://msdl.microsoft.com/download/symbols. [1]

[1] https://docs.microsoft.com/en-us/windows/desktop/DxTechArts/debugging-with-symbols#using-the-microsoft-symbol-server