Restoring the previous Outlook version involves toggling the “New Outlook” switch off in the mail app’s settings. If you’ve recently updated and found yourself wondering how to switch back to the old outlook, you’re not alone—many users prefer the classic interface for its familiarity and stability. This guide walks you through the exact steps to revert, plus troubleshooting tips if the toggle isn’t working.
Microsoft has been rolling out a new Outlook experience for Windows that replaces the classic Mail and Calendar apps. While the new version offers modern features, it also lacks some tools you might rely on daily. Switching back is straightforward, but the process depends on your version of Windows and Outlook.
Why You Might Want To Switch Back
The new Outlook is designed to be faster and more integrated with Microsoft 365. However, many users report missing features like offline access, custom views, and certain add-ins. Others find the interface cluttered or slow on older machines.
Common complaints include:
- No offline mode for email or calendar
- Limited support for non-Microsoft accounts (like Gmail or Yahoo)
- Missing advanced rules and folder management
- Different keyboard shortcuts that disrupt workflow
- Performance issues on low-RAM computers
If any of these sound familiar, reverting to the classic Outlook might be the right move. The old version still recieves updates and security patches, so it’s not outdated.
How To Switch Back To The Old Outlook
Here is the complete step-by-step process for Windows 10 and Windows 11 users. The method works for both the standalone Outlook app and the version included with Microsoft 365.
Step 1: Open The Outlook App
Launch Outlook from your Start menu or taskbar. Make sure you are using the new Outlook interface—you’ll know because the top ribbon looks different and there’s a “Try the new Outlook” toggle in classic versions.
Step 2: Locate The Toggle Switch
In the new Outlook, look for a toggle switch in the top-right corner of the window. It’s usually near the “Help” icon (question mark). The toggle says “New Outlook” and is blue when active.
If you don’t see the toggle, you might be in a version where it’s hidden. In that case, go to File > Options > General and look for “Enable the new Outlook” under the “Outlook Start and Exit” section.
Step 3: Turn Off The New Outlook
Click the toggle so it turns gray. A confirmation dialog will appear asking if you want to switch back. Click “Yes” or “Switch.” Outlook will restart automatically and load the classic interface.
If the toggle is missing entirely, you may need to use a registry edit (see FAQ below). But try the simple toggle first—it works for most users.
Step 4: Verify The Change
After restart, check that the ribbon looks like the classic version (File, Home, Send/Receive, Folder, View tabs). Your emails, calendar, and settings should remain intact. If something looks off, repeat the steps or restart your computer.
What If The Toggle Is Not Available?
Some users report that the “New Outlook” toggle is grayed out or missing. This usually happens if you’re using a work or school account managed by IT. In that case, you might not have permission to switch back.
Try these workarounds:
- Check for updates: Go to File > Office Account > Update Options > Update Now. Sometimes a pending update blocks the toggle.
- Use the classic Outlook app from Microsoft Store: If you had the Mail and Calendar apps, reinstall them from the Store. They are separate from the new Outlook.
- Contact your IT admin: If you’re on a managed device, ask them to disable the new Outlook via group policy.
For personal accounts, you can also try repairing Office via Control Panel > Programs > Microsoft 365 > Change > Quick Repair.
How To Prevent Automatic Switch To New Outlook
Microsoft sometimes forces the new Outlook on users through updates. To avoid this, you can disable the toggle permanently.
Disable The New Outlook Toggle
Go to File > Options > General. Uncheck “Enable the new Outlook” if it’s there. This removes the toggle from the interface.
Use Group Policy (For Advanced Users)
If you have Windows Pro or Enterprise, you can use the Local Group Policy Editor:
- Press Win + R, type gpedit.msc, and press Enter.
- Navigate to User Configuration > Administrative Templates > Microsoft Outlook 2016 > Outlook Options > Other.
- Find “Do not show the new Outlook toggle” and set it to Enabled.
This prevents the new Outlook from appearing at all.
Common Issues After Switching Back
Even after successfully reverting, you might encounter a few hiccups. Here’s how to fix them.
Missing Emails Or Folders
If emails disappear after switching, don’t panic. The new Outlook sometimes caches data differently. Wait a few minutes or restart Outlook. If still missing, go to File > Account Settings > Account Settings and verify your email account is connected.
Search Not Working
Classic Outlook uses a different search index. Go to File > Options > Search and click “Indexing Options.” Make sure Outlook is included in the indexed locations. Rebuild the index if needed.
Add-Ins Not Loading
Some add-ins are only compatible with the new Outlook. Check for updates for your add-ins or reinstall them from the Office Store. Go to File > Options > Add-ins to manage them.
Frequently Asked Questions
Can I Switch Back To Old Outlook On Mac?
Yes, but the process is different. On Mac, open Outlook and go to Help > Check for Updates. If you’re using the new Outlook, you’ll see an option to “Revert to Legacy Outlook” in the same menu. Note that the new Outlook for Mac is still in preview, so reverting is more stable.
Will I Lose My Data If I Switch Back?
No, your emails, contacts, and calendar events are stored on the server (Exchange, IMAP, or POP). Switching back only changes the interface. However, local rules and custom views might reset. Backup your .pst file if you’re concerned.
How Do I Switch Back To Old Outlook Without The Toggle?
If the toggle is missing, you can use a registry edit. Close Outlook, open Registry Editor (regedit), navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences, and create a DWORD called NewOutlookToggle with value 0. Restart Outlook. This forces the classic version.
Warning: Editing the registry can cause issues if done incorrectly. Backup your registry first.
Is The Old Outlook Still Supported?
Yes, Microsoft continues to support classic Outlook with security updates and bug fixes. However, new features are only added to the new Outlook. The classic version will be supported until at least 2025 for Microsoft 365 subscribers.
Can I Use Both Old And New Outlook At The Same Time?
No, you can only run one version at a time. But you can install the classic Mail and Calendar apps from the Microsoft Store alongside the new Outlook. They are separate programs and won’t conflict.
Final Thoughts On Switching Back
Reverting to the classic Outlook is a simple process for most users. The toggle switch is the easiest method, but if it’s not available, registry edits or group policy can help. Remember that the old Outlook is still fully functional and supported, so you don’t miss out on security.
If you ever want to try the new Outlook again, you can always turn the toggle back on. Microsoft is constantly improving it, so future updates might address your concerns. For now, stick with what works best for you.
We hope this guide answered your question about how to switch back to the old outlook. If you run into any issues, leave a comment below or check Microsoft’s support forums for additional help.
One last tip: If you use multiple email accounts, set up each one individually after switching. Sometimes the new Outlook merges accounts in a way that classic Outlook doesn’t handle well. A quick re-add of your accounts usually fixes any sync problems.
Happy emailing—with the interface you prefer.