Setting up future meetings with participants using Teams calendar or Outlook integration
Hello Katherine,
Please refer to the link below https://learn.microsoft.com/en-us/microsoftteams/troubleshoot/teams-administration/clear-teams-cache
If Teams is still running, right-click the Teams icon on the taskbar, and then select Quit.
Open the Run dialog box by pressing the Windows logo key +R.
In the Run dialog box, enter the following path, and then select OK: %appdata%\Microsoft\Teams
Delete all files and folders in the directory.
Restart Teams.
or
Type settings in the search box, and then select the Settings app from the results.
Select Apps > Installed apps, and then type Microsoft Teams in the search box.
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.
Best regards,
Trish - MSFT | Microsoft Community Support Specialist