No you do not need to keep Outlook open during indexing. It does take a while for the indexing to complete. Do keep us updated on how it goes and if you need further assistance on the issue.
Open Indexing Options in the Windows control panel. In the Indexing Options dialog box, make sure that Microsoft Outlook is listed in the Included Locations column. If Microsoft Outlook is not listed, select Modify, and then click to enable the check box next to Microsoft Outlook.
THEN back In the Outlook Options window click on Search and then under Sources click on the tab Indexing Options. In the Indexing Options window click on Advance. Under Index Settings click on Rebuild. As Indexing takes a long time, allow Outlook to rebuild the Indexing for about 12 to 24 hours and verify the result after about 24 hours.
If Outlook has not finished indexing, note the items remaining to be indexed, wait five minutes, and then check again. If the number of items did not decrease, continue to the next step. Start Outlook and click in the Search box.
Why is my mailbox not indexed in Outlook 2016?
This probably means that Outlook might not be able to check its data files for Indexing. In Outlook 2016 though, we have an easy way to analyze if the Mailbox is indexed or not.
How do I Index a file in outlook?
In Outlook click on File and then then click on Options. In the Outlook Options window click on Search and then under Sources click on the tab Indexing Options.
How do I rebuild an index in outlook?
Follow these steps: Click the File tab in Outlook, and then select Options. Next, choose the Search tab from the left column, and click on Indexing Options. When the Indexing Options window appears, click on the Advanced button. Under the Index Settings tab, click on Rebuild .
Go to Tools|Options|Search, then UNcheck the Outlook and Archive, click OK, then exit Outlook. Restart Outlook and do the same but this time CHECK Outlook and Archive, then OK. Exit Outlook one more time, then restart Outlook. May take Outlook some time to finish the re-indexing. This worked for me., and good luck.
How to change the outlook stores indexed by Windows Search?
At the right of this command we must select the command Indexing Options as shown in the image below. Once selected, the Indexing Options dialog box appears as shown below, where we can notice the following:.