Meeting SDK Slow Initialization

Meeting SDK Windows
1

Problem Description

  • From calling InitSDK() to receiving onAuthenticationReturn (Auth success) takes approximately 20 seconds.
  • The main bottleneck is stuck at waiting proxy detecting....
  • We also frequently see the error: Error: Send error, 10051 Unknown error.
  • The application is primarily used by users in China mainland (we have already changed strWebDomain to zoom.com).

Log Excerpt

[2026-05-12 14:33:47.824][25768] open zoom app with  "init" "" "PHLDl6tshZetkbUR"
getServiceHub
Error: Send error, 10051 Unknown error
[2026-05-12 14:33:50.540][25768] Sdk init success
[2026-05-12 14:33:50.540][25768] auth sdk with jwt token  "eyJhbGciOiJIUz..."
Error: Send error, 10051 Unknown error
Error: Send error, 10051 Unknown error
[2026-05-12 14:33:50.856][25768] waiting proxy detecting...

[2026-05-12 14:34:10.493][25768] CSDKLoginCBHandler::onAuthenticationReturn 0
[2026-05-12 14:34:10.493][25768] CAuthSDKWorkFlow::onAuthenticationReturn 0
[2026-05-12 14:34:10.494][25768] Auth success

What we have already tried

  • Changed InitParam.strWebDomain to L"zoom.com"
  • Using JWT for SDK authentication (shared JWT + per-user ZAK)
  • InitSDK is called as early as possible at application startup
  • We have attempted to use INetworkConnectionHelper + ConfigureProxy with auto_detect = false, but the delay still persists.

Questions

  1. What is the recommended way to completely disable or significantly speed up the automatic proxy detection on Windows?
  2. Are there any additional configuration parameters or best practices for fast initialization in China/Asia network environments?
  3. Could the repeated 10051 errors be related to IPv6, WinHTTP settings, or something else?