iPhone Calendar Events Search Not Working

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I'm using Windows 10 and Outlook 2019.

I have an iPhone 7 and and iPad Air. I sync the same Outlook calendar to each device with iTunes. The iPad does not have an issue in finding my search requests. The iPhone is not returning any search results. These entries are new, just entered a few days ago. I confirmed that I can view the event.

Has anyone run across this issue? Can you tell me if there is anything I can do to fix this issue?

Thanks in advance.