Search Stopped Working In Outlook

You type a name, subject, or keyword into Outlook’s search bar—nothing. The search stopped working in Outlook, and suddenly your inbox feels like a black hole. Whether it’s a corrupted index or a sneaky Windows update, the frustration is real. The good news? You can fix it without IT support—and we’ll show you exactly how. But first, why does this happen when you least expect it?

Why Outlook Search Fails When You Need It Most

Outlook’s search relies on a behind-the-scenes index, much like a librarian’s catalog. When that index breaks, search results vanish. Common culprits include:

• Windows Search service – If this background process crashes, Outlook can’t query its index.
• Corrupted OST/PST files – These store your emails locally. If they’re damaged, search may ignore them.
• Outdated Office version – Microsoft frequently patches search-related bugs. Running an old build? You might be missing fixes.
• Third-party add-ins – Some plugins interfere with Outlook’s search functionality, especially if they modify email data.

The worst part? These issues often surface after a Windows update or when your mailbox hits a certain size. But don’t panic—most fixes take less than 10 minutes.

Is It Really Outlook’s Fault? Check These First

Before diving into complex fixes, rule out the obvious:

1. Restart Outlook – Sounds simple, but it resolves temporary glitches.
2. Test Windows Search – Open File Explorer and search for a file. If that fails too, the issue is system-wide.
3. Check your internet connection – If you’re using an Exchange account, a weak connection can break search.
4. Try searching in OWA – Log into Outlook on the web. If search works there, the problem is local to your Outlook app.

If none of these work, it’s time to dig deeper.

Step-by-Step: Fixing a Broken Outlook Search Index

The index is the heart of Outlook’s search. When it’s corrupted, you’ll see partial results—or none at all. Here’s how to rebuild it:

Method 1: Rebuild the Index in Outlook

Outlook includes a built-in tool to reset the index. Here’s how to use it:

1. Open Outlook and go to File > Options > Search.
2. Click Indexing Options, then Advanced.
3. Under the Index Settings tab, click Rebuild.
4. Wait for the process to complete (this can take hours for large mailboxes).
5. Restart Outlook and test search again.

If the search stopped working in Outlook after this, the issue might be deeper.

Method 2: Reset Windows Search via Services

Outlook relies on the Windows Search service. If it’s disabled or stuck, search won’t work. Fix it like this:

1. Press Win + R, type services.msc, and hit Enter.
2. Find Windows Search in the list.
3. Right-click it and select Restart.
4. If the service isn’t running, double-click it, set Startup type to Automatic, and click Start.
5. Restart your PC and open Outlook.

Still no luck? The next step is more aggressive.

Method 3: Delete and Recreate the Search Index (Advanced)

If rebuilding the index didn’t work, you may need to delete it entirely. This forces Windows to create a fresh one:

1. Open Indexing Options (search for it in the Start menu).
2. Click Advanced, then Rebuild under the Troubleshooting section.
3. If that fails, click Delete and rebuild index (this will take time).
4. Restart your computer and let Windows rebuild the index overnight.

For most users, this resolves the search stopped working in Outlook issue. But if you’re still stuck, there’s one more trick.

When All Else Fails: Disable Outlook’s Built-In Search

If the index is beyond repair, you can force Outlook to use Windows Desktop Search instead. This bypasses Outlook’s native search engine:

1. Close Outlook completely.
2. Press Win + R, type regedit, and hit Enter.
3. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Search (replace 16.0 with your Outlook version).
4. Right-click in the right pane, select New > DWORD (32-bit) Value, and name it DisableServerAssistedSearch.
5. Double-click it and set the value to 1.
6. Restart Outlook.

This forces Outlook to use a different search method, which often works when the default one fails. It’s not ideal, but it’s a reliable workaround.

Preventing Future Search Failures in Outlook

Once you’ve fixed the search stopped working in Outlook issue, take steps to prevent it from happening again:

• Keep Outlook updated – Enable automatic updates in File > Office Account > Update Options.
• Archive old emails – Large mailboxes slow down search. Use Outlook’s AutoArchive feature to move old emails to a PST file.
• Disable problematic add-ins – Go to File > Options > Add-ins and disable anything non-essential.
• Run ScanPST.exe – This built-in tool repairs corrupted PST files. Find it in C:\Program Files\Microsoft Office\root\Office16 (adjust for your version).

Outlook’s search is powerful—but fragile. A little maintenance goes a long way in keeping it running smoothly.

Still Not Working? Check These Hidden Settings

If you’ve tried everything and the search stopped working in Outlook persists, check these often-overlooked settings:

• Search scope – Ensure you’re searching All Mailboxes or the correct folder in the dropdown menu.
• Cached Exchange Mode – If you’re on an Exchange account, try disabling File > Account Settings > Account Settings > Change > Use Cached Exchange Mode.
• Windows Search permissions – Ensure your user account has full control over the %ProgramData%\Microsoft\Search folder.

Sometimes, the fix is hiding in plain sight.