It would be great to see a template for a Flow Button which activates automatic replies (OOF).
I found the article regarding "Outlook Mail REST API reference" at https://msdn.microsoft.com/en-us/office/office365/api/mail-rest-operations#update-auto-reply-setting... regarding Auto Reply Settings. I think it's possible with that, but I hope that someone can provide more information (how to) integrate it in a template.