Chat services can’t be turned off. Unlike social media accounts that you can deactivate for a short (or extended) period of time, a chat service will continue to work even if you’re signed out. If you don’t plan on using the service, deleting the account is reasonable but if you’re taking a break, an Out of Office message is the way to go. Read more https://www.addictivetips.com/web-conferencing/out-of-office-microsoft-teams/