如何知道 Shared Contacts Manager 是否已在全域范围内安装？

To check if a Google Workspace app is installed domain-wide, you should follow these steps:

1. Sign in to 谷歌管理控制台 and log in with your admin credentials.
2. From the Admin Console Home page, go to 应用程序.
3. 点击 应用程序 list to view all installed applications. 
4. Check the installation status. Look for the app you want to check out.

If the app is listed here, it is installed domain-wide. You can click on the app for more details about its installation and settings.