> ## Documentation Index
> Fetch the complete documentation index at: https://help.dingtalk.io/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Prevent Unrelated People from Joining a Meeting?

> Block unrelated people from joining a DingTalk meeting using meeting passwords, lobby controls, allowed-participant lists, and lock-meeting once everyone has joined.

To prevent unrelated people from entering a meeting, DingTalk Meetings provides **security settings** for hosts. Hosts can use these settings to manage participants effectively.

## Availability

Only the host or co-host can open the security menu and configure security settings.

## Configure Security Settings on Desktop

**Method 1:** During a meeting, click **Security** at the bottom, then choose **Lock Meeting**, **Waiting Room**, or **Only members in the organization can join**.

> After the waiting room is enabled, all participants must wait in the waiting room before joining. They can enter only after the host or co-host approves them. Participants in the waiting room can rename themselves or chat privately with the host.

![](https://alidocs.oss-cn-zhangjiakou.aliyuncs.com/res/meonarb1ZE7kmqXx/img/1f644cbc-5589-4be8-b8e3-994e35be182b.png?x-oss-process=image/crop,x_0,y_0,w_1960,h_1366/ignore-error,1)

**Method 2:** During a meeting, click **Members** at the bottom to open the member management panel. Click **Meeting Control** in the lower-right corner of the panel, then choose **Lock Meeting**, **Waiting Room**, or **Only members in the organization can join**.

![](https://alidocs.oss-cn-zhangjiakou.aliyuncs.com/res/meonarb1ZE7kmqXx/img/ee54480e-f087-4275-b946-5464b09c2196.png)

## Configure Security Settings on Mobile

During a meeting, tap **More** in the lower-right corner, tap **Security**, then choose **Lock Meeting**, **Waiting Room**, or **Only members in the organization can join** in the security settings.

> After the waiting room is enabled, all participants must wait in the waiting room before joining. They can enter only after the host or co-host approves them. Participants in the waiting room can rename themselves or chat privately with the host.

![](https://alidocs.oss-cn-zhangjiakou.aliyuncs.com/res/meonarb1ZE7kmqXx/img/e4ce3598-b082-4fff-929a-9b4c08333bee.png?x-oss-process=image/crop,x_0,y_206,w_7446,h_5202/ignore-error,1)