This explains how a Microsoft Teams Admin user can install the Collaboration Connector for Teams app and make it available to the organization’s users.
Note: It is possible to install the custom app as an end-user.
However, doing this might result in problems for other users to read messages from
the user installing the app. It is recommended to install the custom app as a Teams
Admin.
In Microsoft Teams admin center do the following:
Note:
A common error is when uploading a manifest zip with the wrong layout:
“Error while extracting package: Please ensure there are no folders in your app package and that your app package contains only the manifest.json and the two required icon files at its root level. For an easier experience creating your app package, install App Studio from the Teams Store.” - Use a zip tool to make sure the files are not contained in a folder.