In the team calendar, all the calendar connections are managed together in one single connection management. As a first step, you will need to add the connection management center.
This guide assumes you've already installed the "Outlook Calendar Integration Plus" app. If you haven't please install it by follow this guide - Installation & Authentication
Go to your board and click on the "Add view" button
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Scroll down to apps, you might see it in the secondary menu and if not click "Explore more apps"
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Go to Installed Apps, find "Outlook Calendar Integration Plus" and "open in board"
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Adding Connections to the Connection Management Center
Each team member only needs to connect their account once.
To do this, go to the "Connections" or "Teams" tab, click "Add New Connection," and follow the steps to link your account. Each person can only connect their own account.
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The connection process works just like standard authentication.
Select the account to connect
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Sign in by selecting "Continue"
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Approve the permissions by selecting "Allow"
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Setting Your Default Calendar
Once the connection is added, you can select your calendar. The selected calendar is saved per board and determines where events will be created.