Thanks for reaching out. Unfortunately, I’m out of the office from [day/month] to [day/month] with limited/ no access to email. If your question can wait, I’ll be responding to any emails I miss when I return. If not, contact [Name] at [email] or [phone] and he/she will take care of your request.
You don’t have to disclose the specific reason for your absence in your out-of-office message. You can simply say “I’m on leave” or “I’m currently out of the office.” This goes for any reason you’re OOO.

Check this for How to set an Out Of Office reply messages in Outlook[Tutorial/Step by Step Guide]
I used to work with someone who had a message telling people she only checked her email twice a day. You pretty much needed to call her if you needed anything outside of those times. (She worked in a remote office.) I think she had read one of those books on efficiency that recommended scheduled email time. But there were problems with this: 4. My department often had to email attachments or text to illustrate our questions/concerns. And we were on deadlines. Reading a page of text over the phone was not an efficient use of anyone’s time 5. She did outreach & was often out of the office on site visits, trainings, or travel to these places, but never ever set her OOO for these, because she was “working.” However, she was effectively not available to read emails from other staff until after hours on those days.