Hi @vinod k
Welcome to our forum!
Does Outlook web have the same problem?
If you change the keyword, will searching for other emails return the correct results?
In general, when you use Outlook search to get no results, follow the steps provided in this article to fix it:
Moreover, if you installed the March 2024 security update for Microsoft Exchange Server 2019 and 2016, please follow this: Search error in Outlook cached mode after installing March 2024 SU.
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