As an employer one of our policies is to Call in absent days not text them in. This hasn’t worked well as employees ( especially young employees) will still text in those types of messages. It would be wonderful to have a feature in the iPhone that allows for instant text response that can be set up for certain contacts( employees). Something similar to an out of office message in email…” I am not receiving text, please call … … …. and speak to me directly”
That’s just sloppy. We always check who will be available, because usually someone is. We also have a service address, and usually use that for OOO–messages. Then the ones working are responsible for those messages. That said, in my branch nobody seriously awaits an answer in July, but I’m in academica.

I do this when I’m on personal vacations. When I’m doing field work for research, I do tend to add a statement that I won’t have access to email/phone because I’m doing field work in X location.
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.