I ran a nonprofit organization staffed entirely be volunteers (I was one). After one too many people incensed that we did not follow up to their emails within two hours, we had to include an OOO message that said we were a volunteer organization, and any request may take up to two weeks to process. Please email again if you have not heard from us by then.
I have tried this on 3 Iphones, 2 are 8s, and it only works while driving. So DND is on, turned on manually. Scheduled is set to off. Silence “always”, allow calls from, no one. Activate is set to manually, auto reply to all contacts. It will not work unless the person is driving. What am I doing incorrectly?

Physical security is just as important as managing your technology when you are gone for the holidays. Take these key steps to ensure that your office is indeed locked up tight. Make sure no keys are left sitting out where they are easy to see or access. Check with security to make sure that they have keys to get in the building. Check security systems and cameras to be sure that they are fully functional. Make sure that the security system is sending a notification to someone who is actually in town for the holidays, not a manager who is going to be across the country! Lock up desks and filing cabinets, especially those that contain sensitive information. Place all keys in a safe location. Check doors and windows to be sure that they are locked. Review your incident response plan. Do you have a plan for how to respond when everyone is out of the office? This can include everything from a hacker going after your data to a physical emergency at the office.
Different companies have different holiday policies. If you're going to be out of office during the holidays, state it in your email. Hello, Thank you for your email! Season's greetings. I can't to your email now as the office is closed for the holidays. I will not be checking my email from December 22 through January 4. If there's an emergency, please contact me at 123-456-7890. Otherwise, I'll respond to your email as soon as possible when I return. Thank you, Jim Parker. 8. Temporary Out-of-Office Email for Attending a Conference If you're going to a business conference, state it out in your out of office email. This type of email is also a great way to show your contacts that you're growing and advancing your job. Hello, Thank you for reaching out! I am out of office attending the National Association of Sale Manager’s conference in Houston, Texas. I'll be checking my emails occasionally, in case of an emergency, please contact my team member, John Doe at [email protected] or 123-456-7890 Regards, Dorian Emmanuel. 9. Out-of-Office with a Promotion