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Plain is now published on the Microsoft Teams App Store. If you previously used the custom application method where you uploaded the .zip file, you can now migrate to the official store version of the Plain Teams application. Using the App Store version of Plain ensures that you always receive the latest feature updates and bug fixes. However, the .zip installation will continue to work.

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Migrating from the zip to the app store version of Plain

Migrating to the App Store version requires no changes on the Plain side. While the old app is removed, and before you’ve installed the new one, your channel will not be sending any messages to Plain. The gap is short, but do this outside peak hours.
You can always identify the Teams Store version of the application as it will have screenshots in its listing, the manually uploaded .zip version will not.
The Teams Store version has screenshots in its listing, as shown above. The manually uploaded .zip version does not.
Remove the old version of the .zip Plain app from each channel one-by-one and then add the new Plain app to that Teams team / channel again.
  1. Go to the ”…” overflow menu next to each Team or Channel name and select “Manage Team / Channel” and then selecting the “Apps” tab. There you can remove the old application and add the new one
  2. After adding the new Store-based application to all of your channels, your administrator can uninstall the custom application in the Teams Admin portal.
Once you have updated the application in every Teams channel, the migration is complete.