My boss requires us to put a nightly OOO message up, and I HATE it. I pushed back on it for months at first, because people know and understand that the reason no one is responding at 8pm is because the business is closed (or at least, they should understand that…). It wasn’t worth the fight, my boss thinks it’s so important, so I caved and just turn on the message every night. I think it makes us look immature and like we don’t understand business norms, but it’s not the hill I’m willing to die on.
Well, but as others have pointed out, that depends on the part-time job and the industry. If you don’t work Tuesdays and Thursdays, but those are considered standard hours in your business, clients or other folks outside the office might email you on Tuesday morning with something important, not hear back and not know why — and get irritated. If they get an OOO, they now know what to expect or they have a backup option if the matter is urgent.

When Outlook is set up to send automatic replies, you’ll see a message under the ribbon with this information. Select Turn off to disable automatic out-of-office replies. If you want to modify the dates for your automatic reply or the message sent, use the steps above to modify your settings.
Honest communication, even in the form of an email auto reply, is a roadmap. It helps people understand how best to help you and, in turn, allows them to better help themselves. Straightforward expectation setting is a way to be respectful of your coworkers’ time and pressures, but most importantly, it’s a way to be respectful of and guard your time. Even if you don’t feel an intense need to be more open in your workplace correspondence, consider modeling the behavior for others who work with you or, especially, those who work for you. It’s a small change in behavior but it’s a meaningful one. And this summer is the perfect time to start.