Symptoms
In Microsoft Exchange Server 2019, you search your mailbox for a text and select a range of dates whose end date is different from today. When you do this search at 6:00 pm for example, the search result can’t return the email messages that're received on that day after 6:00 pm.
Resolution
To fix this issue, install the Cumulative Update 2 for Exchange Server 2019 or a later cumulative update for Exchange Server 2019.
References
Learn about the terminology that Microsoft uses to describe software updates.