Outlook Search might not work on Windows 11, Microsoft is working on a fix

Microsoft has recently confirmed that Outlook Search experience is broken for Windows 11 users who have configured POP, IMAP, and offline Exchange accounts in their Outlook app. Due to this issue, Outlook users might not see the most recent emails in the search results. Microsoft is already working on a solution to this problem.

Email hosted by Microsoft 365 and connected Exchange accounts use Service Search for a majority of search scopes. So, users configured with such accounts are not affected by this issue.

Microsoft provided the following as the temporary workaround:

1. In Windows, right-click Start, and then select Run. In the Open: box, type regedit, and then select OK. This will open Registry Editor.
2. Find this subkey in the registry and then select it:  HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows 
3. Select Edit > New > Key and name the new key Windows Search.
4. Select the new Windows Search key.
5. Select Edit > New > DWORD Value.
6. Type PreventIndexingOutlook for the name of the DWORD, and then press Enter.
7. Right-click PreventIndexingOutlook, and then select Modify….
8. In the Value data box, type 1 to enable the registry entry, and then select OK.

   Note: To disable the PreventIndexingOutlook setting, type 0 (zero), and then select OK.

9. Exit Registry Editor, and then restart Outlook.

For reference this is how it will appear in Registry Editor when the workaround is enabled: