Body
As of December 19th, 2024, all chat history from MIcrosoft Teams private chats will be deleted after 30 days. This includes both one-on-one and group chats. All files that have been shared will remain intact within the Microsoft Teams Chat Files folder in the OneDrive of the person who shared the file. Below is a walkthrough on how to transfer these files to another location if you wish.
All files shared within a private chat (no matter who shared the files) may be re-shared into a Team. The owner of the file(s) will be visible in the file listing.
How to Re-share a file into a Team
Within the private chat click "Shared" at the top of the screen:
Click on files:
There are two ways to re-share files within a Team - Sharing the link, or original location of the file, or Downloading and Re-uploading a file.