I am not able to set OOO messages at all. Most of the people who are contacting me do so through custom aliases that then come to our team, who each handles specifics. Even if I’m out someone else is available, but I can’t know who is supposed to handle that specific email to be able to redirect without naming everyone, and then confusing things more when Client A gets the same reply as Client B but one needs to go to teammate C and the other to teammates D & E. Then to make just that bit more complicated, there are the clients who think that going around the system to email the teammates directly at our personal email addresses is better but pitch a hissy when we’re OOO but they didn’t get a notice? I just set rules to forward those.
We’ve gone into lockdown in my state again, and one of my colleagues (events) has put the following as her out of office: Thank you for your message, I am working however there may be a delayed response as we manage our current events that have been affected by the recent XXXXXX Lockdown. I will respond to your request as soon as I am able. If the matter is time sensitive that can not wait please contact me on my mobile:

It’s my favorite time of year, which means I’m currently out of the office chugging mugs of choco, stuffing my face with fruit salads and cakes, and attempting to fulfill my lifelong goal of memorizing every single line of [your favorite holiday movie].
I am currently on my annual leave and will return to the office on *date*. If your request is urgent, please contact my colleague *name* at *email* or *phone*.