Microsoft Viva is a useful tool that promotes wellbeing and productivity, however, it can be disabled from other applications such as Outlook and 365 if it is not needed in these places. This can be done in the settings menu of the application that Viva is integrated with, for example, if you have Viva Insights integrated with your Microsoft Docs software, you can select the ellipses in the top-right of the Viva Insights window and navigate to settings from there.