If the above solutions are not working, users can try rebuilding the Outlook Search Index as it can help resolve the issue. Now, restart the application one more time and see if the Search feature is properly functioning or not. Then after some minutes, starting the application again and indexing the Outlook by selecting the checkbox.

The best result can be obtained by first disabling the Outlook application by unselecting it and then closing the application. You can index the whole Outlook application itself. Here, check whether Outlook data file (PST file) is indexed or not.

A new window, Index Locations will get opened.

Or navigate File>Options>Search>Indexing Options in the Outlook application itself.

Click on Indexing options and then click on Modify button.

Open Control Panel directly or by pressing Windows+R and typing Control Panel in it.

Users can check their Outlook PST mailbox whether indexed or not (which can be the cause for Search Issue) with the given process: Note: Try uninstalling and then re-installing the Outlook application (Microsoft Office program) from the Control Panel also.

Next, run the Outlook application and check if the Search feature is working well or not.

Next, as per your requirement, choose either Quick Repair or Online Repair option to start repairing the Microsoft Office program.

Then select the Microsoft Office option from the programs list and click on Change option.

Navigate to Programs>Programs & Features.

Users can try fixing this issue by repairing the Microsoft Office program which provides solutions like Microsoft Outlook online using these steps.

Once done, close the Outlook application now and run it again.

In the COM Add-Ins page, unselect all Microsoft Add-ins and then click on OK.

Select COM Add-Ins and click on Go option.

Now that MS Outlook is opened in safe mode, go to Files>Options.

To start Outlook application in safe mode, press Windows+R and type this command:.

It means running Outlook without Add-Ins. Solutions to resolve “Email Search Not Working in PST” Now, that reasons for the failure of Search feature function are stated, now the time is to discuss the solutions to resolve this issue and make the Search feature work again. Some reasons of great chances for this issue to occur are stated here: Searching emails in Outlook PST file is needed to be worked again with the causes responsible for it in knowledge.

Recommended: Free Methods to Repair PST File

Outlook search tools greyed out