What is an out of office message?
An out of office message is an automatic email or chat reply that lets people know you are away, when you will be back, and who to contact if their request cannot wait. It sets expectations so senders are not left wondering whether you saw their message.
How do I write a professional out of office message?
Keep it short and specific. State that you are out of office, the dates you are unavailable, when you will return, and a backup contact for urgent issues. Skip personal details, and close with a clear next step so the sender knows what to do.
What should I include in a vacation auto-reply?
Include four things: the reason you are out (vacation, leave, conference), your last day in the office, the date you return, and a backup contact email or name. If your reply window will be slow on return, mention that too so people plan accordingly.
How do I set an out of office in Gmail, Outlook, or Slack?
In Gmail, open Settings, scroll to Vacation responder, set the dates and message, and save. In Outlook, go to File then Automatic Replies and configure separate internal and external replies. In Slack, click your avatar, choose Set a status, and pair it with a workflow or DM auto-reply for full coverage.
Should out of office messages mention a backup contact?
Yes whenever possible. Naming a teammate (with their email) gives senders a real path forward instead of waiting for you. If you cannot name a backup, point urgent requests to a shared inbox or support channel so nothing critical stalls.