Additional file-related features and issues within Microsoft Teams for business
Hi, JacksonH5
Good day!
Thank you for posting to Microsoft Community. We are happy to assist you.
According to your description, I'm sorry to hear that you're having trouble with the file upload feature in Microsoft Teams. Currently, there is no option to revert the settings back to the previous behavior of allowing you to replace an existing file with a new version.
This is a recent change that was made to improve the security and integrity of files in Teams.
Meanwhile, we're looking for the solutions and see if we can get some workaround for you.
Will be back for you soon. Thanks for your patience.
Thanks for your precious time and your understanding would be highly appreciated.
Hope you all the best!
Sincerely,
Alex | Microsoft Community Moderator.