Many users want to try the redesigned New Outlook for Windows but need a way to switch back to the familiar Classic Outlook interface. Microsoft provides a built-in toggle that lets you change your experience instantly. This article explains how to find and use this switch, manage your data during the transition, and what to expect from each version.
Key Takeaways: Switching Outlook Interfaces
- Try the new Outlook toggle: Instantly switches your interface from Classic to New Outlook and back without restarting the app.
- File > Office Account > About Outlook: This menu path confirms your current version and provides access to the toggle in some builds.
- Windows 11 Search Index: The New Outlook uses the system-wide Windows Search index, which must be configured correctly for local search to work.
Understanding the New and Classic Outlook Versions
The Classic Outlook refers to the desktop application included with Microsoft 365 or Office suites, also known as Outlook for Windows. It stores email data in local PST or OST files and has a full ribbon interface. The New Outlook is a progressive web app built on the same codebase as Outlook on the web. It offers a simplified, modern interface and is designed to eventually replace the classic desktop client.
A key technical difference is how they handle data. Classic Outlook uses a local cache file for accounts like Microsoft Exchange. New Outlook relies more on direct online synchronization and uses the Windows Search index for finding local items. Your accounts, emails, and calendar events sync between both versions because they are stored on your mail server. However, some advanced features like certain add-ins or PST file management are only available in the Classic version.
Steps to Switch Between Outlook Interfaces
The primary method to toggle is a switch located in the top-right corner of the Outlook window. The exact label may vary slightly depending on your current version and update channel.
- Open Outlook
Launch Microsoft Outlook on your Windows 10 or Windows 11 PC. Ensure you are signed in with your Microsoft 365 or Outlook.com account. - Locate the toggle switch
Look at the top-right corner of the main Outlook window. If you are in Classic Outlook, you should see a toggle button labeled “Try the new Outlook” or a similar phrase. If you are already in New Outlook, the button will say “Switch back to classic Outlook”. - Click the toggle button
Click the button once. A confirmation dialog will appear, explaining what will happen during the switch. Your emails and accounts will remain intact. - Confirm the switch
Click “Get started” or “Switch” in the confirmation dialog. The interface will change immediately without requiring you to close and reopen Outlook.
Alternative Method via the Help Menu
If the toggle button is not visible, you can check your version and find the option through the Help menu.
- Go to File > Office Account
In Classic Outlook, click the File tab on the ribbon to open the backstage view. Select “Office Account” from the left sidebar. - Check About Outlook
Look for the “About Outlook” button. Clicking it opens a dialog that shows your version details. In some builds, this dialog contains a link to “Try the new Outlook”. - Use the toggle link
If the link is present, click it to initiate the switch to the New Outlook interface.
Common Mistakes and Limitations to Avoid
New Outlook Search Returns No Local Results
The New Outlook app uses the Windows Search index. If search finds nothing, the Windows Search service may be disabled or the index may be corrupt. Go to Windows Settings > Privacy & security > Searching Windows and ensure “Find my files” is set to “Enhanced”. You can also rebuild the index via Control Panel > Indexing Options > Advanced > Rebuild.
Certain Add-ins or Features Are Missing
The New Outlook does not support COM add-ins, which are common for advanced integration with other desktop software. Features like local PST file creation and some classic printing dialog options are also not available. If you rely on these, you must switch back to Classic Outlook to use them.
The Toggle Button Is Not Visible
If you cannot see the switch to try the new Outlook, your organization’s IT admin may have disabled it through group policy. Alternatively, you may be using an older perpetual license version of Office that does not include the new app. Updating to the latest Microsoft 365 version usually resolves this.
New Outlook vs Classic Outlook: Key Differences
| Item | New Outlook | Classic Outlook |
|---|---|---|
| Primary Technology | Web-based (PWA) | Native desktop application |
| Data Storage | Online-focused, uses Windows Search index | Local PST/OST cache files |
| Add-in Support | Web add-ins only | COM and web add-ins |
| Offline Access | Limited, requires prior synchronization | Full access via local cache |
| Interface | Simplified, single-line ribbon | Traditional full ribbon |
| Account Setup | Streamlined modern authentication | Classic manual server settings |
You can now freely experiment with both Outlook interfaces to see which one fits your workflow. Remember that your core data syncs across both versions, so switching back is safe. For advanced users, a concrete tip is to press Ctrl+E in New Outlook to quickly jump to the search box, just like in the classic client. If you frequently switch, note that some settings like the reading pane position are remembered separately for each version.