# Meeting SDK Slow Initialization

**URL:** <https://devforum.zoom.us/t/meeting-sdk-slow-initialization/143899>\
**Category:** Windows\
**Created:** [May 28, 2026, 10:11am UTC](https://devforum.zoom.us/t/meeting-sdk-slow-initialization/143899 "2026-05-28T10:11:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lixn](https://avatars.discourse-cdn.com/v4/letter/l/58956e/32.png) [@lixn](https://devforum.zoom.us/u/lixn)\
**Post date:** [May 28, 2026, 10:11am UTC](https://devforum.zoom.us/t/meeting-sdk-slow-initialization/143899/1 "2026-05-28T10:11:08Z")

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### 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

```auto
[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?

---

<div class="post-metadata">

**Author:** ![jiedesheng0525](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/jiedesheng0525/32/32181_2.png) [@jiedesheng0525](https://devforum.zoom.us/u/jiedesheng0525)\
**Post date:** [July 22, 2026, 9:08am UTC](https://devforum.zoom.us/t/meeting-sdk-slow-initialization/143899/2 "2026-07-22T09:08:48Z")

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**Hello, has this issue been resolved?**