How do I fix outlook Search Not Working?

I am working on MS outlook account for communicating properly for any kind of small or big tasks. MS outlook email service is one of the most popular email applications, which is mainly used by all types of businesses. Countless users select this emailing service for various purposes. From a few days, my Outlook search function is not working properly, so I am not able to search any type of tasks. I don’t have the permanent resolutions to resolve outlook search not working issue. So anyone can recommend the effective methods to resolve this technical problem.