If you are an IT person looking to allow employees to integrate their own calendars (work or personal), here are the steps to do so:

1. Go to admin.google.com

2. Find the Workspace Marketplace Settings on the left navigation

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3. If you are blocking users from installing apps, select the "Allow users to install only allowed applications" option. Manage the allowlist and add Together as an application.

For information on how a user can integrate their individual calendars, see this article.