We've had a few calls related to messages disappearing in the desktop version of Microsoft Teams. We've had a few more reports of this now and from what we can tell it appears to be an issue with the desktop app. Messages are still appearing in the web and mobile app. The good news is that this would suggest the messages aren't lost but just not appearing in the desktop version.
Our hope is that Microsoft will release an update in the near future to resolve this, but in order to try and fix this immediately, can you please try out the instructions below. A more graphical set of instructions are available in the attached Word document.
Reset Teams App
N.B. When you reset the Teams app, the app data will be deleted. This includes any personalization settings that you might have configured. Messages will be re-downloaded from Microsoft's servers but some personalisation may need to be reset manually (e.g. meeting background settings).
- Close down teams.
- In the system tray at the bottom right of the screen (where the volume and network connection icons are), expand the system tray by clicking the up arrow.
- Locate the Teams icon in the system tray and right click. Select 'Quit Teams'
- Type 'settings' in the search box in Windows (bottom of screen, in taskbar - may just be a magnifying glass), and then select the Settings app from the results.
- Select Apps > Installed apps, and then type 'Microsoft Teams' in the search box (note it's not the one right at the top of the screen, but the one just below that).
- Locate the New Microsoft Teams app from the results, select the More options button (...) on the right, and then select Advanced options.
- In the Reset section, select Reset.
- Restart Teams.