Building, integrating, or customizing apps and workflows within Microsoft Teams using developer tools and APIs
Hi
You can upload custom apps in the Teams client and Teams admin center. First, you'll check if custom app policies are allowed within your organization. Then select Upload App on the Manage Apps page.
In Teams client:
In Teams admin center:
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.