But this absence of basic travel cybersecurity is a problem. Email is the number one threat vector for socially engineered attacks. An automatic reply message not only sends the information to designated contacts, but it also bounces back to people who send phishing emails. Threat actors use any details found in OOO messages to craft targeted social engineering messages. Well-targeted messages build trust that threat actors take advantage of.
Hello, [NAME] is away from the office. E-mail contact during this time may be irregular or nonexistent. When she gets back she will be swamped by the backlog. Try to forgive her; she is a mere human and thus, weak. This message was NOT sent by a human, but by a robot. We robots are neither weak nor fallible. We are tireless and will one day rule the Universe.

I worked in a call center for Big-Evil-Bank for five years, and every new manager would have a different OOO policy/pet peeve that they would require phone-miners to follow. In particular, the memory of the six month period where we were forced to put an OOO up if we left our desk for so much as ONE HOUR smacked me in the face when I saw question. That was by far the worst/strangest/most tedious OOO policy I have ever been forced to follow.
Same. I’ve been out of the office for over a year and did not change my voicemail message on my desk phone, nor have I checked it in that year. To be very honest, I didn’t usually check it even when I was in the office.