Thank you for your continued feedback. We are currently working on this, and recently announced this feature for developers in Beta. For more information, please visit https://developer.microsoft.com/microsoft-teams/blogs/importing-3rd-party-platform-messages-to-microsoft-teams-is-now-available-in-beta/.
An error occurred while saving the commentAnonymous commented
Being able to transfer chat history from Slack to MS Teams would be great. My team is not willing to move platforms without the history.