It will show you several feasible solutions to fix this issue.
Right now, you’re free to get these solutions from theMiniToolwebsite.
Microsoft Outlook is a popular email client for you whose operating system is Windows.
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A Windows update or corrupted Office installation may cause this issue.
Step 1: Click theStartmenu and selectSettings.
Step 2: ClickUpdate & Securityand then click theWindows Updatetab from the left side.

Step 3: ClickCheck for updatesto find out if any updates are available for download.
Step 4: Download and set up the updates.
Step 3: ClickView update history.

Step 4: ClickUninstall updates.
Step 5: choose the most recently installed Microsoft Windows update and clickUninstall.
Step 1: OpenOutlookand go toFile>Options.

Step 2: Click theAdd-instab from the left side.
Step 3: smack the drop-down menu forManage, chooseCOM Add-insand click theGo…button.
Step 4: Check the recently installed Add-in and click theRemovebutton.
Step 5: Relaunch Outlook and peek if the error Outlook couldnt complete your search is resolved.
Step 1: Typecontrol panelin the search bar and then clickControl Panelto open it.
Step 2: ChooseView by: Small iconsand clickPrograms and Features.
Step 3: SelectMicrosoft Officeand clickChange.
Step 4: SelectQuick Repairto quickly find and fix minor issues with the Outlook client.
Step 5: If the issue still exists, checkOnline Repair.
This option requires a working internet connection.
Step 1: Typeindexingin the search bar and then clickIndexing Optionsto open it.
Step 2: Click theAdvancedbutton.
Step 3: Under the Index configs tab, click theRebuildbutton underTroubleshootingsection.
After you finish the steps above, you could successfully rebuild indexing.
Then you could find out if the Outlook couldnt complete your search issue is solved.
Bottom Line
Thats all the information about how to solve the Outlook couldnt complete your search problem.
if you stumble on this problem, it’s possible for you to try these solutions to fix it.