So if your employer migrated from Skype for Business to teams, it is going to be an annoying change because by default you will not be able to send IMs to Teams from outlook unlike Skype used to be. But with a small change in Teams it is possible.
– Open Teams
– Click on your Profile icon and select Settings
– Under General, check the box next to “Register Teams as the chat app for Office (requires restarting Office applications)”
– Restart Outlook Desktop Client
Only annoying thing is you cannot see the Email subject in Teams unlike Skype