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You should wait until the index is done rebuilding. Note: When the index is being rebuilt, your search will not work.
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All you need to do is follow these steps to rebuild your Outlook 2016 search index: This is easy to do, it just may take some time. If nothing else works, you may need to rebuild your index.
#Missing emails in outlook 2016 2017 how to#
Learn more about how to run scanpst.exe here. You can search for this file on your computer by typing in Scanpst.exe into the File Explorer(make sure it is not just searching the folder you are currently in, but choose “This PC” on the left hand side of File Explorer.) If you run this, it will repair any corrupted pst or ost file. To check the file and repair it in Outlook 2016 just search for scanpst.exe file. There could be a corrupted pst-file that’s causing the search problems with the Outlook Search Index.