Service Desk

Go to File > Options and select Search in the left pane.

Next, click the Indexing Options button.

Indexing Options will open up; click the Advanced button. Note that this step may require administrator privileges.

Next, on the default Index Settings tab click the Rebuild button.

Do note that while the index is being rebuilt searches probably won’t work, so just wait until the process completes. The amount of time it takes to complete varies depending on the number of emails, file size, and processing power.

You can see the status of the process updating at the top of Indexing Options window. If you have other apps running in the background, then you’ll see “Indexing speed is reduced due to user activity.”