Hello @mani,
I checked the screenshot you provided, the "MessageTrackingLogMaxAge" parameter specifies the message tracking log maximum file age. I see that the value of this parameter in your environment is 30 days. Logically speaking, there should be no problem. You should be able to view content within the past 30 days.
So, I checked about the description of other parameters in your screenshot. It seems that "-MessageTrackingLogMaxDirectorySize" will also affect the record. When the maximum directory size is reached, the server will delete the oldest log file first. So, I'm guessing it might have something to do with this.
Currently, unfortunately, you can no longer view records for "14 th Aug" as it has likely been deleted by the server. But you can reset the values of these parameters now so that you can view the records later.
Please check this: Set-TransportService you can set the value you want according to your needs.