Hi @박상혁 (Parker)
Teams tag is mainly focused on the general issue of Microsoft Teams troubleshooting. According to your description, your question is related to Teams Development which is not in our support scope. To better help you solve your problem, please add the Teams Development tag to your post. Thanks for your understanding and patience!
The following suggestion is for your reference:
Create connectors for Microsoft 365 Groups
Manage Microsoft 365 connectors and custom connectors
After you update the Office 365 connector URLs in Microsoft Teams, the existing URLs generally won't continue to work. This is because the update process involves reconfiguring the connectors to ensure that they meet the latest security and functionality requirements. If you send requests to the old URLs after the update, you might get 404 errors.
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.