You can follow the below steps to schedule Out Of Office in Microsoft Teams.

• First, launch the Microsoft Teams client.
• Go to your profile picture at the top of Teams and select Set status message.
• Select Schedule out of office at the bottom of the options.
• From the screen that appears, turn on the toggle next to Turn on automatic replies.
• Type an out of office message in the text box. This message will appear when people contact you in Teams or open your profile. It’ll also be sent as an automatic reply in Outlook.
• If you’d like to send an automatic message to people outside of your organization, select the check box next to Send replies outside my organization and choose between your contacts or all external senders. You can tailor your out of office message to this audience, or use the same message you typed above by copying/pasting it into the text box.
• Based on when you’ll be out of the office, pick the dates and times that your out of office message and status will start and stop displaying by selecting the check box next to Send replies only during a time period. 
• Select the Save button.