Out Of Office status message from Teams, Sync with Outlook Automatic Reply, An easy way to set 

Set Out Of Office message from Microsoft Teams now same as Outlook Automatic Reply | New Feature
Select your profile picture, and then Set status message - Schedule out of office.
Or go to Settings - General - Out of Office and select Schedule.
Just as you would in Outlook, you can personalize your automatic reply and choose how long it's set.