An out-of-office message is a crucial part of your business. Regardless of the type of business you run, an out-of-office message lets your contacts know when you're not available. It is important to leave an out-of-office message if you're not available for a long time. You can make the automated reply as detailed as you want, but you should still include a professional greeting and your contact information.

See also - https://www.newstowns.com/how-can-you-create-an-out-of-office-message/