How to get Team Calendars bundled with an existing Data Center instance
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Summary
The Team Calendars app is now bundled with Confluence Data Center since February 1, 2021
TC will be integrated with versions 7.11+ of Confluence DC out of the box, but you can get the bundle to work on previous versions as well. This means not needing to manage a separate license for the app since it is now tied to the Data Center one.
If you are running Confluence DC below version 7.11 and have the app installed, you should be seeing the following message for the plugin on the Manage Apps screen:
The currently installed version of this app is not approved for Data Center versions of Confluence. Please update to v. 7.0.7, which is Data Center approved.
Although the app will still work in that scenario, you can follow the steps below to remove that message.
Requirements
Confluence Data Center license
Confluence version 7.4.0 - 7.10.x
⚠️ The Confluence version requirement is due to UPM version compatibility. Do not proceed with the instructions below if you are not running a Confluence version within the requirements above.
Solution
To get Team Calendars bundled with Confluence DC versions below 7.11, proceed as follows:
Upgrade Team Calendars to 7.0.7 or later
Upgrade UPM to 4.3.1 or later
Here you can find the guide for upgrading UPM:
Once those steps are done, you should see the following message on the Team Calendars menu under Manage Apps:
Team Calendars is now part of Confluence Data Center.
It will also no longer be possible to change the license key for this app, since it's now tied to the application one.

Please refer to the article in case you want to know How to enable Team Calendars in Confluence Data Center after migration from Server
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