Why did all my chats disappear on Microsoft Teams one day. I didn't touch anything.

I did use the web version, it's from my organization.

Hi April,

Thanks for contacting us and sorry for the inconveniences,

There are several possible reasons why your chats might have disappeared on Microsoft Teams, such as network issues, corrupted files, policy changes, or app glitches.

One solution is to sign out and sign in to Teams again, or use the web version of Teams instead of the desktop app. This might help refresh your data and sync your chats with the cloud. You can also clear your Teams cache by deleting the files in %appdata%MicrosoftteamsCache folder. This might help fix any corrupted or outdated files that are causing the problem.

Another solution is to check if there are any changes in your M365 or Teams policies that might affect your chat retention or visibility. For example, if your admin has applied a sensitivity label or a retention policy to your chats, they might be hidden or deleted after a certain period of time. You can contact your admin to see if this is the case and if they can adjust the settings for you.

A third solution is to use a backup tool to backup your Teams data regularly and restore it when needed. This can help you avoid losing your chats due to unexpected errors or incidents. There are some third-party tools that can help you backup and restore your Teams data, such as SysTools Office 365 Backup & Restore.

I hope this helps!

Regards, Sola

Can anyone help