Automatic Reply (Out of Office) in Outlook is used to send responses automatically when you are unavailable. Sometimes, users find that automatic replies are not sending, only work internally, stop working after a while, or do not turn on at all. This issue can occur in Outlook desktop, Outlook on the web, or Microsoft 365 accounts.
In most cases, automatic reply not working in Outlook is caused by incorrect account type, disabled rules, Outlook not running, server-side settings, cached profile issues, or mail delivery restrictions, not by Outlook itself. The steps below will help you fix the problem step by step.
How to Fix Automatic Reply in Outlook Not Working
Follow the steps below in order. After each step, test the automatic reply again before moving on.
1. Check Your Outlook Account Type
Automatic replies behave differently depending on the account type.
- Open Microsoft Outlook
- Go to File > Account Settings > Account Settings
- Check the account type
Automatic Replies (Out of Office) work fully only with Microsoft Exchange, Microsoft 365, and Outlook.com accounts.
POP and IMAP accounts require rules and Outlook must stay open.
2. Make Sure Automatic Replies Are Turned On
Sometimes the feature is not enabled properly.
- Open Outlook
- Go to File > Automatic Replies (Out of Office)
- Select Send automatic replies
- Set the date and time range (optional)
- Enter messages for internal and external senders
- Click OK
If the schedule has expired, replies will stop automatically.
3. Check External Reply Settings
Outlook may be set to reply only to internal users.
- Open Automatic Replies settings
- Go to the Outside My Organization tab
- Enable Auto-reply to people outside my organization
- Choose Anyone outside my organization
- Save the settings
If this is disabled, external senders will not receive replies.
4. Keep Outlook Running (POP / IMAP Accounts)
Automatic replies require Outlook to stay open for some accounts.
- Confirm your account is POP or IMAP
- Keep Outlook running on your PC
- Make sure the PC is connected to the internet
- Disable sleep or hibernation
If Outlook is closed, automatic replies will not be sent.
5. Check Rules and Alerts Conflicts
Rules can block or override automatic replies.
- Go to File > Manage Rules & Alerts
- Look for rules that move, delete, or redirect messages
- Temporarily disable all rules
- Test automatic replies again
Conflicting rules are a common cause of failures.
6. Disable Focused Inbox and Third-Party Add-ins
Add-ins can interfere with Outlook processing.
- Go to File > Options > Add-ins
- Disable non-Microsoft add-ins
- Restart Outlook
- Test the automatic reply feature
Restart Outlook after making changes.
7. Test Automatic Replies Using Outlook on the Web
This helps confirm whether the issue is server-side.
- Open a browser and go to Outlook on the web
- Sign in to your account
- Go to Settings > Mail > Automatic replies
- Turn on automatic replies
- Send a test email from another account
If it works on the web, the desktop app may be corrupted.
8. Recreate Your Outlook Profile
Corrupted profiles can break automatic replies.
- Close Outlook
- Open Control Panel > Mail
- Click Show Profiles
- Add a new profile
- Set it as default
- Open Outlook and configure automatic replies
This fixes many unexplained Outlook issues.
9. Check Mailbox Quota and Delivery Issues
Full mailboxes may block automatic responses.
- Check mailbox storage usage
- Delete or archive old emails if full
- Ask your email administrator to confirm mail flow is working
If emails are not being delivered, replies will not send.
10. Contact Your Email Administrator (Work Accounts)
Some organizations restrict automatic replies.
- Check if automatic replies are blocked by policy
- Ask if external auto-replies are disabled
- Confirm Exchange services are working normally
Administrative restrictions cannot be overridden locally.
Final Thoughts
Automatic reply not working in Outlook is usually caused by account type limitations, expired schedules, rule conflicts, Outlook not running, or profile corruption, not a permanent Outlook failure. In most cases, verifying the account type and configuring automatic replies through Outlook on the web resolves the issue quickly.
For best reliability, Exchange and Microsoft 365 users should always set automatic replies from Outlook on the web, especially before extended absences.
