# No callback from lowerallhands **URL:** \ **Category:** Windows\ **Created:** [June 22, 2025, 10:15am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308 "2025-06-22T10:15:08Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![AJohn](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@AJohn](https://devforum.zoom.us/u/AJohn)\ **Post date:** [June 22, 2025, 10:15am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/1 "2025-06-22T10:15:08Z")
Continuation of topic 55120: devforum(.)zoom(.)us/t/no-callback-from-lowerallhands-function/55120 Still experiencing this issue in the latest version. (6.4.10) It looks like a bug was raised for this - any update on the fix? ---
**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\ **Post date:** [June 27, 2025, 4:21pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/2 "2025-06-27T16:21:23Z")
HI @AJohn Thanks for reaching out to us and welcome to the Zoom Developer Forum! The thread you are sharing here is quite old, so I am not sure if this was fixed back in the day. Can you please try again with the latest version of the meeting SDK for windows 6.5.1.6976 ---
**Author:** ![AJohn](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@AJohn](https://devforum.zoom.us/u/AJohn)\ **Post date:** [June 27, 2025, 10:13pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/3 "2025-06-27T22:13:08Z")
Hi @elisa.zoom Thank you for your reply. As requested, I have today tried the Meeting SDK for Windows version 6.5.1.6976. Unfortunately, I can confirm that this issue still exists. Thanks. 🙂 ---
**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\ **Post date:** [July 7, 2025, 2:27pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/4 "2025-07-07T14:27:42Z")
Thanks for confirming this and sorry for the late reply here! Let me look internally and will get back to you @AJohn ---
**Author:** ![AJohn](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@AJohn](https://devforum.zoom.us/u/AJohn)\ **Post date:** [September 10, 2025, 9:17pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/5 "2025-09-10T21:17:16Z")
Hey @elisa.zoom . Just checking if there’s any update on this one? Thanks. 🙂 ---
**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\ **Post date:** [September 16, 2025, 4:21pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/6 "2025-09-16T16:21:57Z")
Hi @AJohn Thanks for your patience. I was able to get in touch with the Engineer investigating this. Could you please share with me which version of the meeting SDK for Windows are you using? ---
**Author:** ![AJohn](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@AJohn](https://devforum.zoom.us/u/AJohn)\ **Post date:** [September 17, 2025, 8:14pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/7 "2025-09-17T20:14:16Z")
Thanks @elisa.zoom . I have today replicated the issue in v6.5.12.14628. (latest) ---
**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\ **Post date:** [September 18, 2025, 2:45pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/8 "2025-09-18T14:45:54Z")
Hi @AJohn Thanks for your patience here. I got some feedback from our Engineering team and they confirmed that this isn’t a bug. It’s likely due to incorrect user usage. Below, I’ve listed several different scenarios for calling LowerAllHands and the corresponding callbacks. Following these instructions should resolve the issue. 1. In a webinar, if a webinar attendee raises their hand, when the host calls LowerAllHands(forWebinarAttendees = true), the host/cohost/panelist/webinar attendee will all receive the onLowOrRaiseHandStatusChanged callback. Note that the webinar attendee will only receive the onLowOrRaiseHandStatusChanged callback which is about themselves. 2. In a webinar, if a panelist raises their hand, when the host calls LowerAllHands(forWebinarAttendees = false), the host/cohost/panelist will all receive an onAllHandsLowered message. 3. In a normal meeting, if a user raises their hand, when the host calls LowerAllHands(forWebinarAttendees = false), all users in the meeting will receive an onAllHandsLowered message. Note that if the host calls LowerAllHands(forWebinarAttendees = true) at this point, it will return a “wrong usage” message. Hope this helps! ---
**Author:** ![AJohn](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@AJohn](https://devforum.zoom.us/u/AJohn)\ **Post date:** [September 19, 2025, 8:48pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/9 "2025-09-19T20:48:59Z")
Thank you @elisa.zoom for the detail. This has helped clarify things for me. When `LowerAllHands(forWebinarAttendees = false)` is called in a normal meeting, the `onLowOrRaiseHandStatusChanged` callback is **not triggered**. Rather the `onAllHandsLowered` callback is used instead. I’ve now updated my code to utilise the `onAllHandsLowered` callback and can confirm that all is working as expected. Thank you very much for your help with this. ---
**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\ **Post date:** [September 22, 2025, 3:08pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/10 "2025-09-22T15:08:46Z")
Thanks for confirming this helped @AJohn ---
**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\ **Post date:** [September 22, 2026, 3:09pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands/134308/11 "2026-09-22T15:09:10Z")
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