Most of us have transitioned to Teams by now. For those that haven’t, look into it! Something that you may be missing from Outlook if you weren’t aware of how to configure it: Teams Status in Outlook, much like you had with Skype for Business. Here’s how to implement that!
Access Settings through your profile button in the top right:
Under the General tab, locate and select Register Teams as the chat app for Office (requires restarting Office applications).
You can now see Teams' statuses in Outlook.